Q. To measure the speed of an approaching car a police officer shines

  • (A) light waves on it
  • (B) ultra high frequency waves on it
  • (C) microwaves on it
  • (D) radio waves on it
✅ Correct Answer: (D) radio waves on it

Published by Ram Sharma ⭐ 193.88K Points at 12-Mar-2022 11:31 am in Physics

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