Question

define wave length and frequency?

Answer 1

One wavelength :
equals the distance between two successive wave crests or troughs.

Frequency (Hertz) :
equals the number of waves that passes a given point per second.

I hope it helps u......

Answer 2

wave length is defined as the distance between the two consecutive crust and trough in a wave.

frequency is defined as the number of oscillations per second.