Question

Assertion: Materials with smaller angles of refraction are optically denser materials.

Reason: Smaller the angle of incidence, lesser the ray refracted up to a limit.

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:

For a given angle of incidence, a smaller angle of refraction indicates greater optical density ($$\mu = \sin i / \sin r$$). The reason statement is also true as angle of refraction decreases with angle of incidence, but it is not the explanation of the assertion.