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In the diffraction pattern due to single...

In the diffraction pattern due to single slit of width 'a' with incident light of wavelength `lambda` with angle of diffraction `theta`, the condition for the first minimum is

A

`lambda sin theta = a`

B

`a sin theta = lambda`

C

`a cos theta = gamma`

D

`lambda cos theta = a`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A single slit of width a is illuminated by violet light of wavelength 400 nm and the width of the diffraction pattern is measured as y. When half of the slit width is covered and illuminated by yellow light of wavelength 600 nm, the width of the diffraction pattern is

    A
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    B
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    D
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    A
    `sin^(-1)(1//4)`
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    C
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    D
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    A
    `tan^(-1)(3/4)`
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    C
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    D
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