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# Wave Properties

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### Wave Properties

1. 1. Wave Properties<br />Students will be able to<br />Explain wave structure<br />Contrast transverse and longitudinal waves<br />Describe properties of a wave<br />
2. 2. What are Waves?<br />Wave<br /> A disturbance that transfers energy from one place to another<br />5<br />
3. 3. What Carries Waves?<br />Medium<br /> The material through which a wave travels<br />Examples: Liquids, Air, Solids…<br />Mechanical Waves<br /> Waves that need a medium<br />Examples: Water and Sound<br />Electromagnetic Waves<br /> Waves that do not need a medium<br /> Light<br />6<br />
4. 4. Transfer of Energy<br />Mechanical waves travel in a medium<br /> but do not move medium<br />6<br />
5. 5. What Causes Waves<br />A source of energy causes medium<br /> to vibrate<br />7<br />
6. 6. Types of waves<br />Transverse waves (across)<br /> High point – Crest<br /> Low point – Trough<br />8<br />
7. 7. Types of waves<br />Longitudinal Waves<br /> Move medium in to direction of motion<br /> Compression = Come together<br />Rarefactions = Spread out<br />9<br />
8. 8. Representing Waves<br />10<br />
9. 9. Three Properties of Waves<br />Waves can have different amounts<br /> of energy<br />1. Waves can be tall or short<br /> Amplitude<br />2. Waves can occur often or rarely<br /> Frequency<br />3. Waves can move fast or slow<br /> Speed<br />11<br />
10. 10. Amplitude<br />Maximum distance that the particles<br /> of the medium carrying the wave<br /> move away from the rest position<br />12<br />
11. 11. Wavelength<br />The distance between two<br /> corresponding parts of a wave<br />13<br />
12. 12. Frequency<br />Number of waves that pass a<br /> given point in a certain period<br /> of time<br />Hertz<br /> # of waves / second<br />13<br />
13. 13. Speed<br />Lightning<br />Light<br />Sound<br /> Rumble<br />Why?<br /> Light travels faster so it reaches you first<br /> Sound travels slower so comes later<br />14<br />
14. 14. Speed<br />Formula<br /> Speed = Wavelength x Frequency <br />Others can be used<br /> Frequency = Speed / Wavelength<br /> Wavelength = Speed / Frequency<br />14<br />
15. 15. Math<br />15<br />
16. 16. Homework<br />Draw and label a transverse and a<br />longitudinal wave.<br />