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प्रश्न
Which of the following statements are correct?
- Sound is produced by vibrations.
- Sound requires a medium for propagation.
- Light and sound both require a medium for propagation.
- Sound travels slower than light.
पर्याय
i & ii only
i, ii & iii only
ii, iii & iv only
i, ii, iv only
उत्तर
i, ii, iv only
Explanation -
Because light can travel in vacuum also but it is only sound which requires medium to travel.
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संबंधित प्रश्न
Write true or false for a given statement.
A sound is a form of energy.
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
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