Question

explain Doppler's effect of light ?

Answer 1

Doppler earlier found Doppler effect in sound waves and afterwards it applied the same on light waves.
It states that when a source of light moves away the colour of light changes as then frequency and wavelength changes.
Longer wavelength will have red light that means if the source goes away the wavelength seen is red and when the source is near to us then the wavelength seen is blue in colour.

Hope this helps u.................

Answer 2

Answer:

Doppler's effect of light :

It say the clearly visible ( apparent ) change in frequency of sound when source of sound , observer and medium are in relative motion.

The general formula for Doppler's effect is given as :

$\displaystyle \sf n'=n\left[\frac{v\pm v_0}{v\mp v_s} \right]$

Here n' = Apparent frequency

Conditions when Doppler's effect of light is not observed for sound wave

a. When both sound of sound and observer are at rest.

b. When both are moving with same velocity in same direction.

c. When both are moving mutually in perpendicular direction.

d. When distance between both ( source and observer ) is constant.