A light wave is incident normally over a...

A light wave is incident normally over a slit of width `24xx10^-5cm`. The angular position of second dark fringe from the central maxima is `30^@`. What is the wavelength of light?

A

(a) `6000Å`

B

(b) `5000Å`

C

(c) `3000Å`

D

(d) `1500Å`

Text Solution

Verified by Experts

The correct Answer is:

A

For second dark fringe `dsin theta=2lambda`
`=24xx10^-5xx10^-2xxsin 30^@=2lambda`
`implieslambda=6xx10^-7m=6000Å`

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