Question

In case of electromagnetic waves, doppler shifts are independent of whether source moves or observer provided relative speed is the same. True or False?

(a) True

(b) False

I have been asked this question in a job interview.

My doubt is from Waves in section Waves of Physics – Class 11

Answer 1

Correct option is (a) True

To explain: Whether the source moved or the observer would only matter if the waves required a material medium to propagate because then the relative motion between medium and observer would matter.