Question

If a source emitting radiation is moving towards an observer,the frequency of the radiation emitted by the source

Answer 1

If a source emitting radiation is moving towards an observer,the frequency of the radiation emitted by the source will be higher comparatively.

• When a source of radiation moves towards an observer or away from observer , the effect involved is known as Doppler's effect.
• According to Doppler's effect, if a source of radiation/waves moves towards the observed ,there is an apparent increase in frequency, while the opposite takes place when radiation moves away from observer ,the frequency decreases.
• Similar to this, suppose if a source of sound moves towards an observer, each wave takes lesser time than the previous on to reach the observer and so it reaches closer to the observer than the previous one, since time is reduced ,the frequency is increased/Higher.