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A slit of width a is illuminated by whit...

A slit of width a is illuminated by white light. The first minimum for red light `(lambda=6500 Ã…)` will fall at `theta = 30^(@)` when a will be

A

3250Å

B

`6.5xx10^(-4)`

C

`1.24 mum`

D

`2.6xx10^(-4)`

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-WAVE OPTICS-Assignment (Section-A (objective type question(one option is correct)))
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