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प्रश्न
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उत्तर
The sound heard after reflection from a rigid obstacle (such as cliff, a hillside, a wall of a building, edge of a forest etc.), is called an echo.
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संबंधित प्रश्न
Why are the ceilings of concert halls curved?
State two factors on which the speed of a wave travelling in a medium depends.
State two differences between the light and sound waves.
What is the condition necessary for an echo to be heard distinctly?
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
Write the approximate value of the speed of sound in air.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Explain why, the ceilings of concert halls are curved.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
