Coherent light of wavelength` lambda" = 500 nm"` is sent through two narrow parallel slits in a large vertical wall. The two slits are 5 `mu`m apart. In front of the wall there is a semi cylindrical screen with its hori- zontal axis at the line running on the wall parallel to the slits and midway between them. Radius of the cylin- drical screen is `"R = 2.0 m."` Find the vertical height of the second order interference maxima from the centre (O) of the screen.
