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Q.

The speed of electromagnetic wave in vacuum depends upon the source of radiation. It

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a

Decreases as we move from $γ$ -rays to radio waves

b

Is same for all of them

c

Increases as we move from $γ$ -rays to radio waves

d

None of these

answer is C.

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Detailed Solution

$S p e e d o f E M w a v e s i n v a c u u m = \frac{1}{\sqrt{μ_{0} \in_{0}}} = C o n s \tan t$

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