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Light of wavelength lambda=5000Å falls n...

Light of wavelength `lambda=5000Å` falls normally on a narrow slit. A screen is placed at a distance of `1m` from the slit and perpendicular to the direction of light. The first minima of the diffraction pattern is situated at `5mm` from the centre of central maximum. The width of the slit is

A

`0.1 mm`

B

`1.0 mm`

C

`0.5 mm`

D

`0.2 mm`

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The correct Answer is:
A
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