In Fraunhoffer diffraction experiment, L is the distance between screen and the obstacle, b is the size of obstacle and λ is wavelength of incident light. The general condition for the applicability of Fraunhoffer diffraction is :
A
b2Lλ>>1
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B
b2Lλ=1
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C
b2Lλ<<1
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D
b2Lλ≠1
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Solution
The correct option is Bb2Lλ<<1 Fraunhoffer diffraction occurs when,