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प्रश्न
What is mean by the reflection of sound?
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उत्तर
Reflection of Sound:
The bouncing of sound waves from the interface between two media is termed as the reflection of sound.
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संबंधित प्रश्न
How is the frequency of a stretched string related to its length?
Name the characteristic of sound in relation to its waveform
Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
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.
State two factors on which the speed of a wave travelling in a medium depends.
State the use of echo by a bat, dolphin and fisherman.
Name the principle on which a soundboard works.
Name two sound absorbing materials (or objects) which can make our big room less echoey.
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
Point out the waves from the given list, i.e., light, sound, radio waves, ultrasonic waves, and thermal radiation, the energy is propagated by mechanical waves.
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.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
How are bats able to fly in the dark?
What do you understand by the ‘Echolocation system of Dolphins’?
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
A radio signal, sent towards the surface of the moon, is received in 2.5 seconds. If the speed of the radio waves is 3 × 108 ms−1, find the distance of the moon from the earth.
Explain reflection at the boundary of a rarer medium.
What is meant by an echo? Explain.
