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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
State the use of echo by a bat, dolphin and fisherman.
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
What is a bulb horn ? Name the principle on which a bulb horn works.
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
What is meant by echo depth sounding?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
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.
