In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by \[5\times {{10}^{-2}}m\] towards the slits, the change in fringe width is\[3\times {{10}^{-5}}m\]. If separation between the slits is \[{{10}^{-3}}m\], the wavelength of light used is [Roorkee 1992]

In a two slit experiment with monochromatic light fringes are obtained

1.	In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by \[5\times {{10}^{-2}}m\] towards the slits, the change in fringe width is\[3\times {{10}^{-5}}m\]. If separation between the slits is \[{{10}^{-3}}m\], the wavelength of light used is [Roorkee 1992]
A.	\[6000\,\,{AA}\]
B.	\[5000\,\,{AA}\]
C.	Left handed rotation of 3°
D.	\[4500\,\,{AA}\]
Answer» B. \[5000\,\,{AA}\]

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