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प्रश्न
State one important property of waves used for echo depth sounding.
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उत्तर
The waves used for echo depth sounding are ultrasonic waves (frequency above 20000 Hz). The important property of such type of a wave is that they travel undeviated through long distances and that they can be confined to a narrow beam. They are not easily absorbed in a medium.
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संबंधित प्रश्न
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