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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 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
State two factors on which the speed of a wave travelling in a medium depends.
State the use of echo by a bat, dolphin and fisherman.
Name the principle on which a soundboard works.
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Explain how the principle of echo is used by the bat during its flight at night.
What are mechanical waves?
Explain reflection at the boundary of a rarer medium.
Write short notes on reflection of sound waves from plane and curved surfaces.
