NEET2023Physics-Optics

NEET 2023 Physics Interference Assertion Reason Question

Type: Assertion Reason-assertion-Medium-Class 12

For Young’s double slit experiment, two statements are given below:

Statement I : If screen is moved away from the plane of slits, angular separation of the fringes remains constant.

Statement II : If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

In the light of the above statements, choose the correct answer from the options given below:

A

Both Statement I and Statement II are false.

B

Statement I is true but Statement II is false.

C

Statement I is false but Statement II is true.

D

Both Statement I and Statement II are true.

Correct Answer

Option B

Detailed Explanation

Statement I is true as angular separation depends on the wavelength and slit separation, not the screen distance. Statement II is false; larger wavelength increases angular separation.

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