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UPSC Physics Heat Question Bank Sound, Oscillations, Heat and Thermodynamics

  • question_answer
          Bats can ascertain distance, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted                                    [NDA]

    A) ultrasonic waves from the bat

    B) ultrasonic waves from the distant objects

    C) supersonic waves from the bat

    D) supersonic waves from the distant objects

    Correct Answer: A

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