Question

Both a siren passing by and radar exhibit the Doppler effect. What is the main

Answer 1

Answer:

D. Radar uses radio, and the siren uses sound waves.

Explanation:

The main difference between the siren passing by and the radar is that radar uses radio waves and siren uses sound waves.

• Sound waves are mechanical waves which requires a material medium for their propagation.
• In a vacuum, the sound waves cannot pass through freely.
• Radar is an electromagnetic wave.
• It is particular of radio waves origin.
• Such waves do not require a material medium for their propagation and hence can be transmitted through a vacuum.

Answer 2

Answer: c is the correct answer

Explanation:

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