Waves, Sound, And Light
Glencoe ScienceChapter ResourcesWaves, Sound, and LightIncludes:Reproducible Student PagesASSESSMENTTRANSPARENCY ACTIVITIES Chapter Tests Section Focus Transparency Activities Chapter Review Teaching Transparency ActivityHANDS-ON ACTIVITIES Assessment Transparency Activity Lab Worksheets for each Student Edition ActivityTeacher Support and Planning Laboratory Activities Content Outline for Teaching Foldables–Reading and Study Skills activity sheet Spanish Resources Teacher Guide and AnswersMEETING INDIVIDUAL NEEDS Directed Reading for Content Mastery Directed Reading for Content Mastery in Spanish Reinforcement Enrichment Note-taking Worksheets
Glencoe SciencePhoto CreditsSection Focus Transparency 1: Paul Topp/istockphoto inc.; (inset) Verna Bice/istockphoto inc.Section Focus Transparency 2: Think Stock LLC/Index Stock ImagerySection Focus Transparency 3: Kenneth C. Zirkel/istockphoto inc.Copyright by The McGraw-Hill Companies, Inc. All rights reserved.Permission is granted to reproduce the material contained herein on the conditionthat such material be reproduced only for classroom use; be provided to students,teachers, and families without charge; and be used solely in conjunction with theWaves, Sound, and Light program. Any other reproduction, for use or sale, is prohibited without prior written permission of the publisher.Send all inquiries to:Glencoe/McGraw-Hill8787 Orion PlaceColumbus, OH 43240-4027ISBN 0-07-867159-0Printed in the United States of America.1 2 3 4 5 6 7 8 9 10 079 09 08 07 06 05 04
ReproducibleStudent PagesReproducible Student Pages Hands-On ActivitiesMiniLAB: Try at Home Refraction of Light . . . . . . . . . . . . . . . . . . . . . 3MiniLAB: Separating Wavelengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Lab: Sound Waves in Matter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Lab: Bending Light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Laboratory Activity 1: Transverse Waves . . . . . . . . . . . . . . . . . . . . . . . . 9Laboratory Activity 2: Scattering of Light Waves. . . . . . . . . . . . . . . . . 11Foldables: Reading and Study Skills . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Meeting Individual NeedsExtension and InterventionDirected Reading for Content Mastery . . . . . . . . . . . . . . . . . . . . . . . 15Directed Reading for Content Mastery in Spanish . . . . . . . . . . . . . . 19Reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Enrichment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Note-taking Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 AssessmentChapter Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Chapter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Transparency ActivitiesSection Focus Transparency Activities . . . . . . . . . . . . . . . . . . . . . . . . 40Teaching Transparency Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Assessment Transparency Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Waves, Sound, and Light1
Hands-On ActivitiesHands-OnActivities2 Waves, Sound, and Light
DateClassHands-On ActivitiesNameRefraction of LightProcedure1. Fill a drinking glass about half full with drinking water.2. Place a pencil in the glass. Describe the appearance of the pencil.3. Slowly add water to the glass. Describe how the appearance of the pencilchanges.ObservationsAnalysisCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.1. How does the appearance of the pencil depend on the level of water in the glass?2. Where do the light waves coming from the pencil change speed?3. Infer how the appearance of the pencil and the change in speed of the light waves are related.Waves, Sound, and Light3
NameDateClassProcedure1. Place a prism in sunlight. Adjust its position until a color spectrum isproduced.2. Place the prism on a desktop. Dim the lights and shine a flashlight on theprism. Record your observations.3. Shine a laser pointer toward the prism. Record your observations.WARNING: Do not shine the laser pointer into anyone’s eyesObservationsObservationsFlashlight on PrismLaser Pointer Toward PrismAnalysis1. Determine whether sunlight and the light emitted from the flashlight contain light waves ofmore than one wavelength.2. Determine whether the light emitted from the laser pointer contains light waves of more thanone wavelength.4 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Hands-On ActivitiesSeparating Wavelengths
NameDateClassHands-On ActivitiesSound Waves in MatterLab PreviewDirections: Answer these questions before you begin the Lab.1. What factors affect the speed of sound?2. What is the order of increasing density of the materials that you are testing?In this lab you can hear differences in sound when the sound waves travelthrough various materials.Real-World QuestionHow does the movement of sound wavesthrough different materials affect the soundswe hear?Goals Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. Notice the variations in sound when wavestravel through different materials.Infer what property of the materials causethe sound waves to produce a differentsound.Materials150-mL beakers (4)watervegetable oilcorn syruppencilSafety PrecautionsProcedure1. Use the data table on the next page foryour data.2. Fill a beaker to the 140-mL line with water.Fill another beaker with 140 mL ofvegetable oil. Fill a third beaker with140 mL of corn syrup. Leave the fourthbeaker empty.3. Hold the pencil securely and tap the side ofthe beaker about halfway down from itsrim. Use the metal band near the end ofthe pencil to make a clear sound.4. Pay careful attention to the pitch of thesound. Notice whether the sound continues for a moment after the tap or if it stopssuddenly. In your data table, write adescription of the sound that you hear.5. Repeat steps 3 and 4 for the remainingbeakers. You may wish to tap each beakerseveral times to be sure you hear the soundwell.6. Compare the sounds made by the beakerfilled with air and the beaker filled with thedifferent liquids.Waves, Sound, and Light5
NameDateClass(continued)Sound Waves through MaterialsBeakerWaterVegetable OilCorn SyrupEmptyConclude and Apply1. List the materials in the beakers in order of increasing density.2. Infer how the pitch of the sound changes as the density of the material in the beaker increases.3. How does the density of the material in the beaker affect how long the sound continued to beheard after the beaker was tapped?Communicating Your DataCompare your results with other students in your class.6 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Hands-On ActivitiesData and Observations
NameDateClassHands-On ActivitiesBending LightLab PreviewDirections: Answer these questions before you begin the Lab.1. Draw a sketch of a light wave being reflected off a flat surface.2. Draw a sketch of a light wave being refracted as passes from one medium into another.What happens to light waves when they strike the boundary between twomaterials? Some of the light waves might be reflected from the boundary andsome of the waves might travel in to the second material. These light wavescan change direction and be refracted in the second material. Transmissionoccurs when the light waves finally pass through the second material.Real-World QuestionCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.What happens to light waves when they strike aboundary between air and other materials?Goals Compare and contrast the reflection,refraction, and transmission of light.Observe how the refraction of white lightcan produce different colors of light.Materialssmall piece of cardboardtapeflashlightclear plastic CD caseprismscissorsflat mirror250-mL beakerSafety PrecautionsProcedure1. Use the data table on the next page torecord your observations.2. Cut a slit about 3 cm long and 2 mm widein a circular piece of the cardboard. Tapethe cardboard to the face of the flashlightto make a mask.3. In a darkened room, shine the flashlight atan angle toward the mirror. Determinewhether the flashlight beam is reflected,refracted, or transmitted. Look at the colorof the light beam after it strikes the mirror.Has the white light been changed intodifferent colors of light? Record yourobservations on the chart.4. Remove the clear plastic front from anempty CD case. Shine the flashlight at anangle towards the plastic. Does transmission occur? Record your observationsabout how the direction of the beamchanges the colors of the light.5. Fill the beaker with water. Shine the flashlight toward the side of the beaker so thatthe light shines through the water. Movethe light beam from side to side. Recordyour observations.6. Shine the flashlight toward a side of theprism. Move the light beam around untilyou see the outgoing beam spread intodifferent colors. Record your observations.Waves, Sound, and Light7
NameDateClass(continued)SurfaceBending of Light by Different SurfacesHow Beam Is AffectedColors FormedMirrorCD caseWaterPrismAnalyze Your Data1. For which objects did reflection occur? For which objects did refraction occur? For whichobjects did transmission occur?2. For which objects did refraction cause the flashlight beam to be separated into different colors?Conclude and Apply1. Compare and contrast the behavior of light waves when they strike the mirror and the CD case.2. Explain why the beam that passes through the CD case does or does not change direction.3. Describe how the light beam changes as it passes through the prism.Communicating Your DataCreate a sketch showing how light refracts in a prism and divides into different colors.8 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Hands-On ActivitiesData and Observations
NameDateTransverse WavesHands-On Activities1LaboratoryActivityClassYou are surrounded by a variety of waves such as visible light waves, soundwaves, and radio waves. These waves interact with matter, and waves of thesame type interact with each other. You are about to explore two questions.What happens when a wave strikes a boundary between two materials? Whathappens when two waves traveling in the same material meet?StrategyYou will use a long rope to observe the behavior of a wave at a boundary.You will observe the behavior of waves that travel from both ends of a longrope and meet in the middle.Materialsrope, 8–10 meters longCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Procedure1. Make a data table in your Science Journallike the one shown to record your observations. Be sure to leave enough room foryour comments.2. With a partner, lay the rope on the floorand stretch the rope to its full length. Holdone end of the rope still while your partnercreates a wave with a single crest or troughby moving their end of the rope horizontally back and forth. Observe the behaviorof the wave when it reaches the end of therope and strikes a boundary—your hand.3. Using the same procedure as before, createa single crest of a wave in both ends of therope at the same time. Observe the behavior of the wave when the two crests meet inthe center of the rope.4. Using the same procedure, create a crest atone end of the rope and a trough at the otherend of the rope at the same time. Observethe behavior of the wave when the crestand trough meet in the center of the rope.Data and ObservationsWave ObservationsWaveObservationStep 2Step 3Step 4Waves, Sound, and Light9
NameDateClassLaboratory Activity 1 (continued)1. What changes occurred in the wave in step 2 when the wave hit the boundary?2. Did the wave have the same amount of energy after it hit the boundary? Explain.3. What happened when the waves met in the center of the rope in steps 3 and 4?4. Infer why the size of the waves changed when the two waves met in steps 3 and 4.5. Infer how you can determine the amplitude of the wave created when two waves traveling inopposite directions on the same rope meet.Strategy CheckCan you describe what happens when a wave strikes a boundary?Can you describe what happens when two waves traveling in opposite directions on thesame rope meet?10 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Hands-On ActivitiesQuestions and Conclusions
NameDateScattering of Light WavesHands-On Activities2LaboratoryActivityClassOn a sunny day, you might have seen dust particles in a beam of sunlight.When light waves in the sunbeam strike a dust particle, they are reflected in alldirections. This process, in which light traveling in one direction is made totravel in many directions, is called scattering. Sunlight is scattered when itstrikes dust particles floating in the air. You see the dust particles as brightspecks of light when some of these scattered light waves enter your eyes. Justlike dust particles, tiny droplets of water in the air can cause scattering. Also,milk contains tiny particles of milk fat that can cause scattering of light waves.StrategyYou will use a clear glass beaker, water, whole milk, and a flashlight to observethe scattering of light by particles of milk fat in a beaker of water.You will record your observations in a data table as more milk is added to thewater.Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Materialsclear glass 500-mL beaker50-mL beakerwhole milkeye droppersmall flashlight3” x 5” index card (2)hole punchdistilled waterProcedure1. Turn off the lights in the room and darkenthe room. Allow enough light into theroom so that you can safely work.2. Put about 250 mL of distilled water intothe 500-mL beaker.3. Put about 25 mL of whole milk into the50-mL beaker. This will be used later in thelab.4. Use a hole punch to make a hole in one ofthe index cards. Position the hole so thatthe center of the flashlight goes throughthe hole when the card is sitting on the labtable.5. Place the index card with the hole next tothe clear beaker of water. Have a lab partner hold the other index card about 30 cmaway from the beaker directly opposite theindex card with the hole.6. Turn on the flashlight and hold it againstthe index card with the hole. Position theflashlight so that the center of the beamgoes through the hole in the index card.Observe the image on the index card onthe other side of the beaker.7. Record your observations in your datatable.8. Add 1 2 dropper of milk to the water in thebeaker and stir. Repeat steps 5–7.9. Repeat step 8 until the water appears tolook more like milk than water.Waves, Sound, and Light11
NameDateClassLaboratory Activity 2 (continued)Amount of MilkObservationsNo MilkQuestions and Conclusions1. What did you observe when the light traveled through the beaker that contained only water?2. What did you observe when the light traveled through the beaker of water as you progressivelyadded more milk?3. Why did adding more milk to the beaker cause the image on the index card to change?Strategy CheckCan you describe how a light beam is affected when it travels through a medium thatdoes not contain other particles?Can you describe how a light beam is affected as it travels through a medium that contains particles of another material?12 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Hands-On ActivitiesData and Observations
NameDateClassHands-On ActivitiesWaves, Sound, and LightDirections: Use this page to label your Foldable at the beginning of the chapter.Transverse WavesBothCompression Wavescause particles in matter to move backand forth at right angles to the directionin which the waves travelare mechanical wavesCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.carry energy from one place to anothercause particles in matter to move backand forth along the same direction inwhich the wave travelshigh points in the waves are called crestslow points in the waves are called troughsplaces where the coils are squeezedtogether are called compressionsplaces where the coils are spread apartare called rarefactionshave the properties of wavelength,frequency, and amplitudeWaves, Sound, and Light13
Meeting Individual NeedsMeeting IndividualNeeds14 Waves, Sound, and Light
NameDateOverviewWaves, Sound, and LightDirections: Complete the concept map using the terms in the list verberationintensitypitchMeeting Individual NeedsDirected Reading forContent MasteryClassWavestypes ofCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.1.2.exampleexampleLightSoundhashasproperty ofproperties of3.intensity5.7.6.crests4.compressionsWaves, Sound, and Light15
NameDateDirected Reading forContent MasterySection 1Section 2 ClassWavesSound WavesDirections: Match the terms in Column I with the phrases in Column II. Write the letter of the correct phrase inthe blank at the left.Column IColumn II1. wavea. measured in units called decibels2. wavelengthb. change in direction of a wave when it4. refraction5. diffraction6. intensity7. pitch8. reverberationtravels from one material to anotherc. transports energy from one place toanotherd. how low or high a sound seemse. measured in units called Hertzf. repeated echoesg. bending of waves around objectsh. the distance between one point on awave and another one like it9. What is the law of reflection?10. Describe how a sound travels through air when a student taps his pencil on adesk.16 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Meeting Individual Needs3. frequency
NameDateDirected Reading forContent MasterySection 3 ClassLightDirections: Use the following terms to complete sentences below.electromagnetic waveselectromagnetic spectruminfrared wavesultraviolet waves1. Waves that can travel through empty space are .quencies and wavelengths.3. Waves that have wavelengths between one thousandth and 0.7 millionths of ameter are known as .4. Waves that have wavelengths between about 0.4 millionths and ten billionths ofa meter are known as .5. You must protect your skin from because they candamage your skin.Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.6. All warm bodies emit .7. Night vision goggles use to help locate people in thedark.8. Visible light waves are part of the .9. All have an electric and magnetic part.10. The waves emitted by the Sun are .Waves, Sound, and Light17Meeting Individual Needs2. The is the complete range of electromagnetic wave fre-
NameDateClassKey TermsWaves, Sound, and LightDirected Reading forContent MasteryDirections: Use the clues below to complete the crossword puzzle.Across1. Carries energy from one place toanother5. A series of compressions and rarefactions forms this wave6. Describes the behavior of waveswhen they strike a surface3. How low or high a sound seems7. The distance between two adjacentcrests or between two adjacenttroughs8. The change in direction of a wavewhen it travels from one mediumto another9. A type of wave that is emitted by allwarm bodies10. The bending of a light wave aroundan object11. A property of waves that is measured in units called decibels1Down2. The complete spectrum of electromagnetic wave frequencies andwavelengths52346789101118 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Meeting Individual Needs4. The number of wavelengths thatpass by a point each second
NombreFechaLectura dirigida paraDominio del contenidoClaseSinopsisLas ondas, el sonido y la luzSatisface las necesidades individualesInstrucciones: Completa el mapa de conceptos con los términos de la siguiente lista.de ostonoreverberaciónTipos de ondasCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.1.2.ejemploejemploLa luzSonidotienentienenpropiedad esLas ondas, el sonido y la luz19
NombreFechaLectura dirigida paraDominio del contenidoSección 1Sección 2Clase Las ondasLas ondas sonorasInstrucciones: Relaciona los términos de la Columna I con las frases de la Columna II. Escribe la letra de la frasecorrecta en el espacio en blanco de la izquierda.Columna IColumna IIa. se mide en unidades llamadas decibeles2. longitud de ondab. cambio de dirección de una ondacuando se propaga de un material a otro3. frecuencia4. refracción5. difracción6. intensidad7. tono8. reverberaciónc. transporta energía de un lugar a otrod. lo alto o lo bajo de un sonidoe. se mide en unidades llamadas Hertzf. ecos repetidosg. doblamiento de las ondas alrededor delos objetosh. la distancia entre un punto de una onday otro punto igual en otra onda.9. ¿Qué es la ley de la reflexión?10. Describe cómo viaja el sonido por el aire cuando un estudiante golpea suescritorio con un lápiz.20 Las ondas, el sonido y la luzCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Satisface las necesidades individuales1. onda
NombreFechaLectura dirigida paraSección 3Clase La luzDominio del contenidoInstrucciones: Completa las oraciones con los siguientes términos.ondas electromagnéticasondas infrarrojasespectro electromagnéticoondas ultravioleta.2. El es la gama completa de frecuencias y longitudes deondas electromagnéticas.3. Las ondas cuya longitud está comprendida en la gama de un millonésimo a 0.7millonésimos de metro se llaman .4. Las ondas cuya longitud está comprendida en la gama de 0.4 millonésimos adiez mil millonésimos de metro se llaman .5. Debemos proteger nuestra piel de las porque puedenCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.dañarla.6. Todos los cuerpos calientes emiten .7. Las se utilizan en las gafas de visión nocturna paralocalizar personas en la oscuridad.8. Las ondas de luz visible forman parte del .9. Todas las tienen una parte eléctrica y una magnética.10. Las ondas emitidas por el Sol son .Las ondas, el sonido y la luz21Satisface las necesidades individuales1. Las ondas que se propagan a través de espacios vacíos se llaman
NombreFechaLectura dirigida paraDominio del contenidoClaseTérminos clavesLas ondas, el sonido y la luzInstrucciones: Completa el crucigrama usando las siguientes pistas.15. El espectrocompleto defrecuencias ylongitudes deondas electromagnéticas.234576896. Transportaenergía de unlugar a otro.8. Tipo de ondaque emitentodos los cuerpos calientes.9. Altura de unsonido.101110. La distancia entre dos crestas osenos adyacentes.11. Fenómeno por el cual una ondaluminosa se dobla alrededor de unobjeto.Verticales1. Esta onda está compuesta por unaserie de compresiones y rarefacciones.22 Las ondas, el sonido y la luz3. La cantidad de longitudes de ondaque pasan por un punto cadasegundo.4. Describe el comportamiento de lasondas cuando chocan contra unasuperficie.7. Propiedad de las ondas que se mideen unidades llamadas decibeles.Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Satisface las necesidades individualesHorizontales2. Cambio en ladirección deuna ondacuando sepropaga de unmedio a otro.
Name1DateReinforcementClassWavesCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.1.2.3.Directions: Answer the following questions on the lines provided.4. What is refraction?5. What is reflection?6. What is diffraction?7. What is the mathematical relationship between frequency, wavelength, and wave speed?Waves, Sound, and Light23Meeting Individual NeedsDirections: On the line below each diagram, write the type of wave that is shown in the diagram.
Name2DateReinforcementClassSound WavesDirections: Answer the questions on the lines provided.1. How does a vibrating drum produce a sound wave?3. Explain how intensity, sound, and energy are related.4. What are the three main parts of the human ear and what is the function of each?5. Explain why sound travels faster through iron than through air.24 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Meeting Individual Needs2. Does sound travel outside Earth’s atmosphere in space? Explain.
Name3DateReinforcementClassLightDirections: Answer the questions on the lines provided.1. Compare and contrast light waves and sound waves.Meeting Individual Needs2. Describe the electromagnetic spectrum.3. What are ultraviolet waves, X-rays, and gamma rays used for?Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.4. How do the cornea, lens, and retina aid in the vision process?5. What are rod and cone cells?Waves, Sound, and Light25
Name1DateEnrichmentClassWavesMaterialspie platewaterdrinking glasspencilProcedureData and Observations1. Describe the waves created in step 2.2. Describe the waves in step 4?Conclude and Apply1. What type of mechanical waves did you create?2. What was the matter that carried the wave?3. What happened to the waves when they reached the glass?26 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Meeting Individual Needs1. Pour water into the pie plate. Fill the pie plate half full.2. Using the pencil, gently tap the water in the plate to create waves.3. Put a drinking glass in the center of the pie plate. Put water into the glass if it is not heavyenough to stay upright.4. Using the pencil, gently tap the water in the pie plate to create waves.
NameEnrichmentProtect Your HearingNoise is part of everyday life whether you livein the city or in the country. Prolonged exposure to noises above 85 decibels can cause permanent hearing loss. Exposure to loud noisescan be a result of walking on a busy street, eating in a crowded restaurant, operating machinery, or engaging in recreational activities.How do you know if the noise is too loud?One rule of thumb is if you cannot hear peo Rock concertPower mowerMotorcyclePersonal stereo at a high volumeChain sawWhisperPurringcatClassple talking when you are just a few feet away,the noise may be damaging your hearing. Protect your hearing by decreasing the volume onpersonal stereos and by wearing hearing protection when you are around loud noises.You may not be sure if you are exposed tonoises above 85 decibels. The list below contains the approximate noise level of somesounds. Plot the sounds on the chart below.100–130 decibels105 decibels90–110 decibels105–120 decibels110 shold150dB 015 20 255075 80100110120Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.115RustlingleavesNoisyrestaurantJet planetaking offChainsaw1. What activities do you do that may expose you to high noise levels?2. What can you do to prevent hearing damage or loss while you do your activities?Waves, Sound, and Light27Meeting Individual Needs2Date
Name3DateEnrichmentClassLasersBecause laser light waves are in phase andare traveling in the same direction, a laserlight beam spreads out very little as it travels.As a result a laser beam can be made very narrow so that all the light energy is spread over avery small area. This makes the beam veryintense so that it can be used to cut materials.Lasers are used in a wide variety of applications. Lasers are used to drill holes in diamonds, to measure long and short distances,and to record laser discs. They are used incomputer printers, as cutting instruments fordelicate eye surgeries, and in many otherapplications.1. What does the term laser stand for?2. What does in phase mean?3. Why can laser beams be made very intense?28 Waves, Sound, and LightCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Meeting Individual NeedsA laser is a device that produces an intensebeam of light. The word laser stands for LightAmplification by Stimulated Emission ofRadiation. Light that you normally see is amixture of many colors and many wavelengths. You have probably seen light passingthrough a prism being divided into many colors. Lasers, though, emit light with a singlecolor or frequency. The light waves travel inthe same direction and all of the waves are inphase. In phase means that the troughs andcrests of all the waves are aligned. If you drewa line perpendicular to the waves, the samepoint along the wave would be intersected ineach of the individual waves. This produces abeam of light that is very intense and can bedirected with great accuracy.
NameDateNote-takingWorksheetSection 1ClassWaves, Sound, and LightWavesA. Waves carry , not matter.1. A is a disturbance that moves through matter or space.2. can travel only through some type of matter. can traveleither through matter or through empty space.direction in which the wave travels.4. High points in a transverse wave are called . Low points are called.5. A wave causes particles in matter to move back and forth along the samedirection in which the wave travels.6. The places in a compressional wave in which the coils
Waves, Sound, and Light 5 Name Date Class Lab Preview Directions: Answer these questions before you begin the Lab. 1. What factors affect the speed of sound? 2. What is the order of increasing density of the materials that you are testing? In this lab you can hear differences in sound when the sound waves tra
Handbook: Sound Waves Homework pg. 24 Simulation: Sound Waves 8 The Propagation of Sound Speed of sound Read: Speed of Sound, pg. 243 Problems: pg. 243 #1,3, pg. 246 #1,2,5 Handbook: Propagation of Sound Homework pg. 26 Video: Transverse and Longitudinal Waves 9 The Interference of Sound Interference of sound waves, beat
electromagnetic waves, like radio waves, microwaves, light, and x-rays are examples of transverse waves. Longitudinal waves travel through a medium in a direction parallel to the direction of travel of the wave. Mechanical waves such as sound waves, seismic waves created by earthquakes, and explosions are all examples of longitudinal waves.
Q: What are mechanical waves? A: Waves that require a medium in which to travel. A medium is the _ that waves travel through o Mediums can be solid, liquid, or gas Examples of mechanical waves include sound waves, seismic waves, ocean waves, etc Q: Describe two types of mechanical waves.
College physics Semester 2 Unit 2 What is a wave? How do they act? How are do waves differ? 1/29 Pre-test Waves on a String. Notes: Introduction to Waves . Lab: Waves on a String Activity (PhET) Do: read 12.3 p457 (1,3,5) 1/30 Clicker questions: Waves on a String. Lab: Fourier-Making Waves part 1 (PhET) 2/1 Lab: Fourier-Making Waves part 2 (PhET)
A wave a moving disturbance. (Sound, water waves, etc. make some material substance move as they go by. Electromagnetic waves, such as light or radio waves, make electric and magnetic fields change strength.) Transverse waves: The medium is displaced perpendicular to the direction of propagation. Examples: light, string waves, water waves .
Chapter 16 Waves and Sound 179 Chapter 16 WAVES AND SOUND PREVIEW A wave is a disturbance which causes a transfer of energy.Mechanical waves need a medium in which to travel, but electromagnetic waves do not. Waves can be transverse or longitudinal, depending on the direction of the vibration of the wave.Sound is a longitudinal
Properties of EM Waves Electromagnetic waves are transverse waves Electromagnetic waves travel at the speed of light Because em waves travel at a speed that is precisely the speed of light, light is an electromagnetic wave Electromagnetic waves carry energy as they travel through space, and this energy can be transferred to objects
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