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In a diffraction pattern due to a single...

In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle `30^(@)` when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of

A

`sin^(-1)(3/4)`

B

`sin^(-1)(1/2)`

C

`sin^(-1)(2/3)`

D

`sin^(-1)(1/2)`

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The correct Answer is:
A
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