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प्रश्न
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
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उत्तर
- The term "reflection of a sound wave" refers to the return of a sound wave in the same medium when it strikes a surface like a wall, metal sheet, plywood, etc.
- A reflecting surface's size needs to be greater than the sound wave's wavelength in order for a sound wave to reflect.
- A megaphone (also known as a speaking tube), a sound board, and an ear trumpet are examples of devices that exploit sound wave reflection.
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संबंधित प्रश्न
Define amplitude term in relation to a wave.
What is the condition necessary for an echo to be heard distinctly?
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
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.
Write the approximate value of the speed of sound in water.
Write the approximate value of the speed of sound in iron.
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.
Write short notes on reflection of sound waves from plane and curved surfaces.
