Question:
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
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Doppler effect depends on relative motion — not wave interaction.
Updated On: May 2, 2026
- Doppler effect
- Phenomenon of beats
- Phenomenon of stationary waves
- Diffraction of sound waves
- Interference of sound waves
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The Correct Option is A
Solution and Explanation
Concept:
Doppler Effect is the change in observed frequency due to relative motion between source and observer.
Step 1: Key idea:
• Approaching → frequency increases
• Receding → frequency decreases
Step 2: Why others are wrong:
• Beats → due to interference of two frequencies
• Stationary waves → superposition in opposite direction
• Diffraction → bending of waves
• Interference → superposition Final Answer: Doppler effect
Step 1: Key idea:
• Approaching → frequency increases
• Receding → frequency decreases
Step 2: Why others are wrong:
• Beats → due to interference of two frequencies
• Stationary waves → superposition in opposite direction
• Diffraction → bending of waves
• Interference → superposition Final Answer: Doppler effect
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