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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
Define wave velocity term in relation to a wave.
State two factors on which the speed of a wave travelling in a medium depends.
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.
Define the term Frequency (as applied to sound waves)
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 why, the ceilings of concert halls are curved.
Explain reflection at the boundary of a rarer medium.
Explain Reflection at curved surfaces.
