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Two coherent light sources S1 and S2 (la...

Two coherent light sources `S_1` and `S_2 (lambda=6000Å)` are `1mm` apart from each other. The screen is placed at a distance of `25cm` from the sources. The width of the fringes on the screen should be

A

(a) `0.015cm`

B

(b) `0.025cm`

C

(c) `0.010cm`

D

(d) `0.030cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`beta=(6000xx10^(-10)xx25xx10^-2)/(10^-3)`
`=150000xx10^-9=0.15xx10^-9`
`=0.15xx10^-3m=0.015cm`.
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Knowledge Check

  • The distance between two coherent sources is 1 mm. The screen is placed at a distance of 1 m from the sources. If the distance of the third bright fringe is 1.2 mm from the central fringe, the wavelength of light used is

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