Question

20 waves pass through a point in 2 seconds. If the distance between one crest and
adjacent trough is 1.5 m. Calculate (a) the frequency. (b) the wavelength

Answer 1

(b) Wave length = 1.5m as wavelength is the distance b/t crest & adjacent through

(a) Frequency = $\sf \huge \frac{No.\:of\:oscillations}{time}$

$\sf⇒\frac{20}{2}$

⇒ 10Hz