A physicist studies the Doppler effect, which is the change in frequency of a spectral line due to the motion of the source or observer. What is the underlying reason for this phenomenon?
Q1. A physicist studies the Doppler effect, which is the change in frequency of a spectral line due to the motion of the source or observer. What is the underlying reason for this phenomenon?
Answer: Classical electromagnetic effects
Explanation: Classical electromagnetic effects are responsible for the Doppler effect, as they arise from the change in the frequency of the light due to the motion of the source or observer.