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Physics
Grade-8
Easy
Question
The electromagnetic waves travel
At the same speed in all medium
At the same speed in metals
At the same speed in a vacuum
At different speeds in a vacuum
Hint:
At the same speed in vaccum.
The correct answer is: At the same speed in a vacuum
All the EM waves travel with same speed as of light in vaccum. But in other media they travel with different speed as their wavelength differ from each other.