1.

In a modified Young's double-slit experiment, source S is kept in front of slit S_(1) as shown in the following figure. Find the phase difference at a point that is equidistant from slits S_(1) and S_(2) and point P that is in front of slit S_(1) in the following situations: If a liquid is filled between the slit and the source S, what is the phase difference?

Answer»

`(2PI)/(lambda)[nsqrt(d^(2)+x_(0)^(2))-x_(0)-(d^(2))/(2D)]`
`(2pi)/(lambda)[nsqrt(d^(2)+x_(0)^(2))-x_(0)+(d^(2))/(2D)]`
`(2pi)/(lambda)[nsqrt(d^(2)+x_(0)^(2))+x_(0)+(d^(2))/(2D)]`
`(2pi)/(lambda)[nsqrt(d^(2)-x_(0)^(2))-x_(0)-(d^(2))/(2D)]`

ANSWER :A


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