1.

In a two slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the slits. If the screen is moved by a distance of 5 xx 10^(-2) m towards the slits, the change in the fringe width is 3 xx 10^(-5) m. If the separation be. tween the slits is 10^(-3) m, the wavelength of light used is :

Answer»

`5 XX 10^(-7)` m
`6 xx 10^(-7)` m
`7 xx 10^(-7)` m
`6 xx 10^(-6)` m

Answer :B


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