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प्रश्न
State one important property of waves used for echo depth sounding.
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उत्तर
Ultrasonic waves can travel long distances without much absorption and can be directed into a narrow beam, making them suitable for echo depth sounding.
संबंधित प्रश्न
The lower the frequency of vibration, the higher is the pitch.
Name the factor that determines Pitch of the note.
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Name musical instrument, one in each case, which produces its notes by using the following. In each case state the method used to produce notes of different pitches and loudness.
(a) A vibrating string.
(b) A vibrating column air.
(c) Vibration of any other body.
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Give a scientific reason.
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