T = 1/f
Since
1. What is meant by the term "frequency" of a sound wave?
Listen 1
2. What is the symbol and unit for frequency??
3. What is meant by the wavelength of a wave?
(It is the actual length of the wave before it repeats itself.)
Listen 3
4. What is the symbol and unit for wavelength?
5. Write down the simple wave equation.
Listen 5
6. The wavelength of a sound wave is 0,85m, and its frequency is 400Hz.
Calculate its speed v.
7. Are sound waves "longitudinal" or "transverse"?
The direction of vibrations and the direction of the movement are in the same direction.
Listen 7
8. What is meant by the period T of a wave, and how is it calculated?
This is the time for which a single wave existed.
9. The frequency of a wave is 400Hz. Calculate its period T?
10. The speed of a sound wave is 340m.s-1, the period is 2 x 10-3 s. Calculate its wavelength λ.
T = 1/f
2 x 10-3 = 1/f
f = 500Hz
v = fλ
340 = 500λ
λ = 0,68 m