Column-I		Column-II
A)	The fringe width for red colour as compared to that for violet colour is approximately	P)	half
B)	In a Young's double slit experiment, the distance between the slits is halved and the distance between slit and screen is doubled then the fringe width will become	Q)	double
C)	If the distance of a surface from light source is doubled then the power received  will become	R)	quarter times
D)	Light from a lamp is falling normally on a small surface. If the surface is tilted to  ${60}^{°}$ from this position, then the power received by the surface will become	S)	four times