Question

2. A wavelength in the middle of visible spectrum will be shifted
towards red when the source and the observer move away from
each other. This is due to
(a) interference of light
(b) dispersion of light
(c) polarisation of light
(d) Doppler effect in light
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Answer 1

Answer:

The correct option has been written as follows:

The above phenomenon is due to:

(d) Doppler effect in light.

When the object moves away from the observer the relative time between impulses increases and hence it is called red shift.

Doppler effect occurs when there is a sudden increase or decrease in the frequency of light, sound or any other form of waves.