Question:
Radar waves are sent towards a moving airplane and the reflected waves are received. When the airplane is moving towards the radar, the wavelength of the wave
Radar waves are sent towards a moving airplane and the reflected waves are received. When the airplane is moving towards the radar, the wavelength of the wave
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The Doppler effect causes the wavelength to decrease when the source is moving towards the observer.
Updated On: Jan 6, 2026
- decrease
- increase
- remains the same
- sometimes increase or decrease
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The Correct Option is A
Solution and Explanation
Step 1: Doppler Effect.
When a source of waves (in this case, the airplane) moves towards the observer (the radar), the wavelength of the waves decreases. This is due to the Doppler effect.
Step 2: Conclusion.
Therefore, the correct answer is option (A).
Final Answer: \[ \boxed{\text{(A) decrease}} \]
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