NEET Physics Question - Wave Optics - Young's Double Slit Experiment

Assertion (A): In the double slit experiment, if one of the slit is closed, no fringe pattern will be observed on the screen.

Reason (R): In interference, phenomenon of diffraction is also included.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true: If one slit is closed, the two-source condition for interference is not met, so a distinct interference fringe pattern is not observed. Instead, a single-slit diffraction pattern appears. Reason (R) is true: The observed double-slit intensity pattern is a combination of interference from two slits and diffraction from each individual slit. Both (A) and (R) are true, but (R) is not the correct explanation for (A).

Rankers Physics

Double slit with one slit closed

Solution:

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