Question

Assertion : In Young’s double slit experiment, interference pattern disappears when one of the slits is closed.
Reason : Interference occurs due to superposition of light waves from two coherent sources.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

When one of the slits is closed, there appears general illumination from a single source. Interference does not take place.