**Wavelength : **

The distance between two consecutive compressions or rarefactions is called wavelength.

**Relation between wavelength, frequency, and wave speed : **

1. Speed of sound can be defined as the distance by which a point on the wave, such as a compression or rarefaction, travels in unit time.

2. Let the distance travelled by a wave in T seconds = λ meters

3. The distance travelled by a wave in 1 second = λ / T meters

4. Thus by definition of speed of wave, v = λ / T** ………… (1) **

5. We know that frequency and time period are related as o = 1 / T **……….. (2)**

6) From (1) and (2) we get v = λ . u ⇒ λ = v / u

∴ Wavelength = Speed of sound / Frequency