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प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
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उत्तर
Yes, sound also follows the same laws of reflection as light waves. The laws of reflection of sound are as follows:
- The incident sound wave, the reflected sound wave and the normal drawn at the point of incidence. All three are in the same plane.
- The normal drawn at the point of incidence of the reflecting surface and the angle between the direction of incidence and the direction of reflection of the sound are equal.
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संबंधित प्रश्न
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.
Name three devices which work on the reflection of sound.
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
What are the medical applications of echo?
______ is an image obtained by the use of reflected ultrasonic waves.
Rohan conducted experiments on echo in different media. He observed that a minimum distance of 'x' meters is required for the echo to be heard in oxygen and 'y' meters in benzene. Compare 'x' and 'y'. Justify your answer.
Speed of sound in oxygen: 340 ms-1
Speed of sound in benzene: 200 ms-1
