In a typical Young's double slit experiment, S1 and S2 are identical slits and equidistant from a point monochromatic source S of light having wavelength λ. The distance between slits is represented by d and that between slits and screen is represented by D. P is a fixed point on the screen at a distance y = from central order bright on the screen: where Do, do are initial values of D and d respectively. In each statement of column-I some changes are made to above mentioned situation. The effect of corresponding changes is given in column-II. Match the statements in column-I with resulting changes in column-II.
(A)The distance d between the slits is doubled keeping distance between slits and screen fixed (P) fringe width increases .
(B)The distance D between slit and screen is doubled by shifting screen to right (Q)Magnitude of optical path difference betweeninterfering waves at P will decrease.
(C)The width of slit S1 is decreased (such that intensity of light due to slit S1 on screen decreases) and the distance D between slit and screen is doubled by shifting screen to right (R)Magnitude of optical path difference between interfering waves at P will increase.
(D)The whole setup is submerged in water of refractive index . (neglecting absorption in medium) (S)The intensity at P will increase
(T)The intensity at P will decrease
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