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The first diffraction minima due to a si...

The first diffraction minima due to a single slit diffraction is at `theta=30^(@)` for a light of wavelength `5000Å` The width of the slit is

A

`5 times 10^-5 cm`

B

`10 times 10^-5 cm`

C

`2.5 times 10^-5 cm`

D

`1.25 times 10^5 cm`

Text Solution

Verified by Experts

Angular position of the first minima is `lamda/d`
or `(30^@ times pi)/180^@= (5000 times 10^-10)/d`
`therefore d=9.55 times 10^-5 cm`
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