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Question

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

A
b2Lλ1
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B
b2Lλ=1
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C
b2Lλ1
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D
b2Lλ1
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Solution

The correct option is C b2Lλ1
The general condition for Froun hofer diffraction is b2Lλ1

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