Assertion :Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical. Reason: Reason : Speed of light in isotropic medium is constant.

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true and reason is not the correct explanation of assertion.

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If assertion is true but reason is false

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If both assertion and reason are false

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Solution

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion.
When the speed of light is independent of direction, the secondary waves are spherical.

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Assertion :Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical. Reason: Reason : Speed of light in isotropic medium is constant.

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion.When the speed of light is independent of direction, the secondary waves are spherical.

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion.
When the speed of light is independent of direction, the secondary waves are spherical.