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
The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 m s−1 for all frequencies, calculate the wavelengths corresponding to the given extreme frequencies of the audible range.
Define amplitude term in relation to a wave.
Define frequency term in relation to a wave.
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 a bulb horn ? Name the principle on which a bulb horn works.
What is a stethoscope ? Name the principle on which a stethoscope works.
Explain how the principle of echo is used by
The bat during its flight at
What are infrasonic waves?
What do you understand by the ‘Echolocation system of Dolphins’?
What are fishing boats?
State two factors on which the natural frequency of a body depends.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
Waves produced on the surface of the water are formed to move with a velocity of 24 ms−1. If the wavelength of these waves equals 20 cm. find the
(i) frequency (no. of waves produced per second)
(ii) the time period (i.e. the time required to produce one wave) for these waves.
