Question

Assertion (A): Dispersion of white light occurs only at the first surface of a prism.

Reason (R): Deviation of light rays occurs at both surfaces of a prism.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion.

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Assertion (A) is false, but Reason (R) is true.

Explanation:

The assertion is true because dispersion occurs at the first refracting face of the prism. The reason is also true that light is deviated at both refracting faces, which confirms that the assertion that dispersion occurs only at the first surface is correct.