Question

Calculate the wavelength of a waveform given a period of 17à ƒ ƒ Ž ¼s.

Answer 1

We know that

Frequency $= \frac{1}{time \ period}$ ........(1)

Wavelength $= \frac{speed \ of \ light }{frequency}$ .....(2)

Using above (1) and (2)

Wavelength = speed of light × time period

$=(3 × 10^8 m/s )× 17×10^{-10}s \\ = 51×10^{-2}m$