Question

20 oscillations can travel 400cm in 5 secondfind frequence,time period, wavespeed and wavelength of the wave?

Answer 1

Frequency = Speed of light ( c ) / Wavelength ( lambda )

Frequency = 3 × 10^8 / 0.002 or 2 × 10^-3

Frequency of wave = 1.5 × 10^11 Hz