Physics
Grade-9
Easy
Question
What kind of waves doesn’t require a medium to travel?
- Sound waves
- Light waves
- Water waves
- All of there
Hint:
Electromagnetic waves (such as visible light and radio waves) do not require a medium, and are the only waves that can travel through a vacuum.
The correct answer is: Light waves
Water and sound waves are mechanical and require a medium in order to travel. Light is not a mechanical but an electromagnetic wave and does not need a medium.
Hence, (B) Light waves is the right answer.
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Match the following with the correct response.
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| 2. Propagation require material medium | B. Oscillatory motion |
| 3. Particles vibrate perpendicular to the | C. Transverse waves direction of wave propagation |
| 4. Back and forth motion | D. Wave |
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| 1. A moving disturbance | A. Mechanical waves |
| 2. Propagation require material medium | B. Oscillatory motion |
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| 4. Back and forth motion | D. Wave |
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Light waves are _____ but not _____ in nature.
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