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प्रश्न
What is a bulb horn ? Name the principle on which a bulb horn works.
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उत्तर
A bullhorn is a cone-shaped wind instrument that is used for signaling in bicycles, cars, buses, trucks, boats, etc. A bullhorn works on the principle of multiple reflections of sound.
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संबंधित प्रश्न
The 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:
- Amplitudes
- Wavelengths
Define frequency term in relation to a wave.
Define wave velocity 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.
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.
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
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.
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.
Explain reflection at the boundary of a rarer medium.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
