Energy WavesEnergy Waves

Kim Lachler

Updated 2015NCES: 6.P.1.1

Energy WavesEnergy Waves Is a disturbance Is a disturbance that transmits that transmits energy through energy through matter or empty matter or empty space.space.

Energy WavesEnergy WavesCarries the energy away Carries the energy away from the sourcefrom the source

The material through which The material through which the wave travel does not the wave travel does not traveltravel

Types of wavesTypes of wavesThere are 2 different types of energy There are 2 different types of energy waveswaves

– Mechanical Waves Mechanical Waves

– Electromagnetic Waves Electromagnetic Waves

Types of wavesTypes of waves Mechanical wavesMechanical waves

waves that need a medium to travelwaves that need a medium to travel– Medium is a substance –Medium is a substance – solid liquid gassolid liquid gas

Energy passed from one particle to anotherEnergy passed from one particle to another

Most waves including sound waves Most waves including sound waves Is there sound in space?Is there sound in space?No, there is no mediumNo, there is no medium

Types of wavesTypes of waves

Electromagnetic wavesElectromagnetic waves– They don’t use a medium to travelThey don’t use a medium to travel

They can go through mediumsThey can go through mediums

Light waves; including visible, microwave, radio, Light waves; including visible, microwave, radio, x rayx ray

Particle MovementParticle Movement

The particles in the medium can The particles in the medium can vibrate in 2 different ways:vibrate in 2 different ways:

– Transversal Transversal

– Longitudinal Longitudinal

Particle MovementParticle Movement Transverse wavesTransverse waves

– particles vibrate perpendicular (up and down) to the energyparticles vibrate perpendicular (up and down) to the energy

– electromagnetic waves (light waves) are transverse waves electromagnetic waves (light waves) are transverse waves even though they do not need particles to travel.even though they do not need particles to travel.

Particle MovementParticle MovementTransverse wavesTransverse waves

high points – crest high points – crest low points – troughlow points – trough rest position – middlerest position – middle

crest

trough

Rest position

Particle MovementParticle Movement Longitudinal wavesLongitudinal waves

– particles vibrate back and forth in the particles vibrate back and forth in the same direction to the energysame direction to the energy

– sound wavessound waves

Particle MovementParticle MovementLongitudinal wavesLongitudinal waves

– compression – when pushed togethercompression – when pushed together

– rarefaction – when pulled apart.rarefaction – when pulled apart.

compression

rarefraction

BibliographyBibliographyHolt, Rinehart, Winston, North Carolina Holt Science & Technology, Holt, Rinehart, Winston, Orlando, Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Holt, Rinehart, Winston, Orlando,

20052005 Fotoseearch, Wave stock photos, http://www.fotosearch.com/photos-images/waves.html, accessed Fotoseearch, Wave stock photos, http://www.fotosearch.com/photos-images/waves.html, accessed 1/6/111/6/11

Google images, Google.com, accessed 1/6/11 Google images, Google.com, accessed 1/6/11

Mechanical Waves, http://electron9.phys.utk.edu/phys135d/modules/m10/waves.htm, Accessed Mechanical Waves, http://electron9.phys.utk.edu/phys135d/modules/m10/waves.htm, Accessed 1/7/111/7/11