Question

Doppler's effect in sound in addition to the relative velocity between source and observer also depends on whether source and observer also depend on whether source or observer or both are moving. Doppler effect in light depends only on the relative velocity of source and observer, the reason for this is:

• A. Einstein's mass-energy relation.
• B. Photoelectric effect.
• C. the velocity of the observer with respect to the light velocity is negligible.
• D. none of these

Answer 1

The correct option is C the velocity of the observer with respect to the light velocity is negligible.

Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer by considering that the velocity of the observer with respect to the source velocity is negligible.