Advertisements
Advertisements
प्रश्न
Explain reflection at the boundary of a rarer medium.
Advertisements
उत्तर
- Consider a wave travelling in a solid medium striking on the interface between the solid and the air. The compression exerts a force F on the surface of the rarer medium.
- As a rarer medium has smaller resistance for any deformation, the surface of separation is pushed backward.
- As the particles of the rarer medium are free to move, a rarefaction is produced at the interface. Thus, compression is reflected as rarefaction and a rarefaction travels from right to left.
Reflection of sound at a rarer medium
APPEARS IN
संबंधित प्रश्न
Define frequency term in relation to a wave.
Define wavelength term in relation to a wave.
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
Name the principle on which a soundboard works.
Write the approximate value of the speed of sound in air.
What is meant by echo depth sounding?
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?
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
When a sound is made from a distance of 18 m, in front of a tall building, it is found to get repeated again. Which phenomenon is associated with this observation? Give a brief explanation of this phenomenon?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
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 why, the ceilings of concert halls are curved.
What is meant by an echo? Explain.
Write short notes on reflection of sound waves from plane and curved surfaces.
