Question

Assertion: On passing through a rectangular glass slab, a ray of light suffers two refractions.

Reason: Light emerges from a rectangular glass slab in a direction parallel to that in which it entered the glass slab.

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:

Light undergoes two refractions: air-to-glass and glass-to-air. Because the opposite faces are parallel, the emergent ray is parallel to the incident ray. Both are true, but the parallelism does not explain why two refractions happen.