JEE PHYSICS MCQ: WAVE OPTICS

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In Fresnel diffraction, if the distance between the disc and the screen is decreased, the intensity of central bright spot will

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Correct option: B

Decrease

Option A (Increase) is incorrect. In Fresnel diffraction, decreasing the distance between the disc and the screen increases the number of blocked half-period zones, thus decreasing the intensity of the central bright spot.

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