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MHT CET 2023 Physics question

PhysicsWave OpticsMHT CET 2023

Light of wavelength 5000 Å is incident normally on a slit. The first minimum of the diffraction pattern is observed to lie at a distance of 5 mm from the central maximum on a screen placed at a distance of 2 m from the slit. The width of the slit is

Answer: (C)

Solution

For the first minimum of single-slit diffraction, . Since is small, . With Å, the slit width is

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Question ID VK-097836