Assertion :When a white light is passed through a lens, violet light is more refracted than red light. Reason: Focal length for red light is greater than violet.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Violet light has higher refractive index than the red light.
Thus, the focal length for red light is greater.
This means that the red light has lower tendency to get refracted than the violet light.
Thus, both assertion and reason are correct and reason is the correct explanation for assertion.

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