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MHT CET Physics question

PhysicsWave OpticsMHT CET

In Fraunhofer diffraction experiment, is the distance between screen and the obstacle, is the size of obstacle and is wavelength of incident light. The general condition for the applicability of Fraunhofer diffraction is

Answer: (C)

Solution

Fraunhofer (far-field) diffraction requires the Fresnel number to be much less than 1; corresponds to

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Question ID VK-077343