Question

Assertion: The optical density of a transparent material has nothing to do with hardness or weight.

Reason: It is a measure of the speed of light through a transparent medium.

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:

Optical density is indeed a measure of the refractive properties and speed of light in a medium, having no relation to physical hardness or mass density. Both statements are true, but the definition does not explain why it is independent of mass density.