资源描述：
《waves - cape breton – victoria regional school board：波-布雷顿角–维多利亚地区学校董事会》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、RRHSPhysics11Unit4Waves©JimBurkeRRHSPhysics11TableofContentsModule4.1IntroductiontoWaves44.1.1WaveProperties44.1.2WaveEquation174.1.3Two-dimensionalWaveProperties274.1.4ModuleSummary35Module4.2SoundWaves364.2.1SoundWaves364.2.2AirColumns494.2.3BeatFrequ
2、ency674.2.4ModuleSummary74Module4.3ElectromagneticWaves754.3.1ElectromagneticWaves754.3.2Refraction824.3.3DiffractionandInterferenceofLight1014.3.4MirrorsandLenses1154.3.5ModuleSummary143Module4.1IntroductiontoWaves4.1.1WavePropertiesWhenyousendawavepul
3、sethrougharopeoraspring,theropeorspringmovesbacktoitsrestpositionafterthewavehaspassedthroughit.Onlytheenergymoveddownthespring.Thisenergywasproducedasaresultofthevibrationofyourhand.Ifthisvibrationoccursasarepeatedpatternoverregulartimeintervals,itisre
4、ferredtoasperiodicmotion;similarly,thewavecreatedisreferredtoasaperiodicwave.Aswasseeninthepreviousmodule,objectsundergoingperiodicmotioncanbedescribedintermsoftheirperiodandfrequency.Period,,istheamountoftimethatittakestocompleteonefullcycleorvibration
5、.Sinceperiodisthetimerequiredpercycle,itcanbecalculatedusing(4.1)Whereisthetimeintervalthatittakestocompletecycles.Youalsolearnedthatfrequency,thenumberofcyclesinatimeinterval,istheinverseofperiod().Frequencycanthereforebecalculatedusing(4.2)Remembertha
6、ttheunitsoffrequencyarehertz(Hz),whichis.ExampleAchildswingsbackandforthonaswing15timesin30.0s.Determinethefrequencyandperiodoftheswing.SolutionSinceperiodisthetimepercycle,UNIT4WavesRRHSPhysicsPage28of105Frequencyistheinverse,thenumberofcyclespersecond
7、WaveTerminologyAwaveisadisturbancethattransfersenergy.Ifthesourceproducingthisenergyisperiodicinnature,thenthewavewillalsobeperiodicinnature.Wewillthereforeoftenuseperiodandfrequencytodescribewaves.Wavescanbebrokenupintotwocategories,asshowninFigure1.Me
8、chanicalwavesarewavesthatrequireamediumfortravel;forexample,waterwavestravelthroughwaterandwecansendapulsethroughaspring.Electromagneticwavesdononeedamediumtotravelin;forexample,lightreachesusfromthesuneventhoughitmusttravelthrou
