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प्रश्न
State two differences between the light and sound waves.
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उत्तर
(i) The light waves can travel in vacuum while sound waves need a material medium for propagation.
(ii) The light waves are electromagnetic waves while sound waves are the mechanical waves.
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 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range
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Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
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.
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
What do you understand by the ‘Echolocation system of Dolphins’?
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?
