Assertion :The velocity of electromagnetic waves depends on electric and magnetic properties of the medium. Reason: Velocity of electromagnetic waves in free space is constant.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion:
The velocity of the electromagnetic wave depends on the electric and magnetic properties and is given by:
$v = \frac{1}{\sqrt{μ_{0} ε_{0}}}$
It shows that the speed of the EM waves depends on the magnetic field as well as the electric field in the medium.

Reason:
The velocity of the electromagnetic waves in free space is constant and is equal to the speed of light.

The assertion and reason bot are correct but this Reason not a proper explanation of Assertion. Option $(B)$ is correct.

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