If one of the slit of a standard Young's double slit experiment is covered by a thin parallel sided glass slab so that it transmits only one-half the light intensity of the other, then

Options

A. the fringe pattern will get shifted towards the covered slit
B. the fringe pattern will get shifted away from the covered slit
C. the bright fringes will be less bright and the dark ones will be more bright
D. the fringe width will remain unchanged.

Answer

A, C, D

Explanation

(c) `I_(max) = (sqrtI_1+sqrtI_2)^2`
`I_(min) = (sqrtI_1-sqrtI_2)^2`
When, `I_1=I_2 =I_0`
`I_(max) = 4I_0 and I_(min)=0`
When, `I_2 = I_0/2,
then `I_(max)lt4I_0 and I_(min)lt0`.