Question

Assertion: The basic cause of refraction is the change in speed of light in going from one medium to the other. 

Reason: No refraction occurs when refractive indices of the two media in contact are equal.

Options

• If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

Explanation: 

Refraction arises primarily because light travels at different speeds across different media. When two media have equal refractive indices, speed does not change and light passes undeviated, but this observation is a consequence rather than the explanation of the assertion.