Question

Which of the following does not affect the apparent frequency in doppler effect?

• A. Speed of source
• B. Speed of observer
• C. Frequency of source
• D. Distance between source and observer

Answer 1

The correct option is D Distance between source and observer

When sound waves are emitted by a moving source, or when the observer of the sound is moving, the apparent frequency of the sound can change. The shift in frequency due to motion of the sound wave source or of the observer is called the Doppler effect. The distance between the source and observer does not affect the apparent frequency in Doppler effect.