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# Waves

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### Waves

1. 1. WAVES
2. 2. Types of Waves
3. 3. Types of Waves <ul><ul><li>Longitudinal Wave </li></ul></ul>
4. 4. Types of Waves <ul><ul><li>Transverse Wave </li></ul></ul>
5. 5. Crest and Trough
6. 6. Amplitude <ul><li>Maximum distance the wave vibrates from its rest position. </li></ul>
7. 7. <ul><li>Which one of these waves has a larger amplitude? </li></ul>
8. 8. Wavelength (λ) <ul><li>The distance from any point on one wave to that same point on the next wave. </li></ul>λ λ
9. 9. <ul><li>Which one of these waves has a larger wavelength (λ)? </li></ul>
10. 10. Frequency (f) <ul><li>The number of waves (or cycles) produced in a given amount of time </li></ul><ul><ul><li>One vibration per second = one hertz </li></ul></ul><ul><ul><li>1Hz </li></ul></ul>
11. 11. <ul><li>Which one of these waves has a higher frequency? </li></ul>
12. 12. <ul><li>f = 1/T </li></ul><ul><li>Frequency and Period are reciprocals of each other. </li></ul><ul><li>v = f λ </li></ul><ul><li>The velocity of a wave equals the wavelength times the frequency . </li></ul><ul><li>λ = v T </li></ul><ul><li>The wavelength of a wave equals the velocity times the period . </li></ul>
13. 13. Reflections Loose End – In Phase Reflection Fixed End – Out of Phase Reflection
14. 14. Reflected and Transmitted
15. 15. Refraction <ul><li>Refraction is the bending of waves when they enter a medium where their speed is different. </li></ul>
16. 16. Refraction <ul><li>Waves passing from one medium to another have the same frequency . </li></ul><ul><li>The wavelength change depends on velocity change so that </li></ul><ul><ul><ul><ul><li>f = v/ λ is constant . </li></ul></ul></ul></ul>