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प्रश्न
Explain how the principle of echo is used by
The bat during its flight at
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उत्तर
Bats can produce and detect the sound of very high frequency. The bats fly with speed much lower than the speed of sound. The sounds produced by flying bats get reflected from any obstacle in front of it. By hearing the echoes, bats come to know where the obstacles are, even in the dark. So, they can fly safely without colliding with the obstacles. This process of detecting obstacles is called sound ranging.
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संबंधित प्रश्न
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.
What is the condition necessary for an echo to be heard distinctly?
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(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
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