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

Assertion (A): In Young's double slit experiment, if one of the slits is closed, intensity at the position of central fringe becomes half.

Reason (R): Resultant intensity, being sum of intensities from individual slits, becomes half as one slit is closed.

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:

If intensity from one slit is (I_0), the central maximum with two slits is (4I_0). If one slit is closed, the intensity at the center becomes (I_0), which is one-fourth, not half. Reason (R) is also incorrect as intensities don't simply add algebraically. Both A and R are false.

Rankers Physics

YDSE One Slit Closed

Solution:

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