Physics
Grade-9
Easy
Question
Which of the following does not require a medium for propagation?
(a) Sound waves
(b) Lightwaves
(c) Water waves
- (b) and (c) are correct
- (a), (b) and (c) are correct
- (a) and (b) are correct
- Only (b)
Hint:
Light waves can travel in vacuum
The correct answer is: Only (b)
Light is an electromagnetic wave that doesn't require the movement of particles to travel hence doesn't require a medium
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