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
Why are the ceilings of concert halls curved?
How is the frequency of a stretched string related it’s tension?
A wire of length 80 cm has a frequency of 256 Hz. Calculate the length of a similar wire under similar tension, which will have frequency 1024 Hz
Define frequency term in relation to a wave.
State the use of echo by a bat, dolphin and fisherman.
How do bats avoid obstacles in their way, when in flight?
The following diagram shows three ways in which the string of an instrument can vibrate.
(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
(c) what is the ratio of the frequency of the vibration in (i) and (ii)?
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
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.
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.
What is meant by echo depth sounding?
What do you understand by the ‘Echolocation system of Dolphins’?
What are fishing boats?
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
