A monochromatic light of `lambda=5000Å` is inciden on two slits seperated by a distance of `5xx10^(-4)m.` if a thin glass of thickness `1.5xx10^(-6)` m and refractive index `1.5` placed between one of the slits and screen. The pahses difference introduced at the position of central maxima isA. `3pi `B. `2 pi`C. `2pi//3`D. `pi//3`

A monochromatic light of `lambda=5000Å` is inciden on two slits seper

1.	A monochromatic light of `lambda=5000Å` is inciden on two slits seperated by a distance of `5xx10^(-4)m.` if a thin glass of thickness `1.5xx10^(-6)` m and refractive index `1.5` placed between one of the slits and screen. The pahses difference introduced at the position of central maxima isA. `3pi `B. `2 pi`C. `2pi//3`D. `pi//3`
Answer» Correct Answer - A Path difference `(mu-1)t=(1.5-1)1.5xx10^(-6)` Phase difference `=(2pi)/(lamda)xx(mu-1)t` `=(2pixx0.5xx1.5xx10^(-6))/(5ccx10)` `=3pi`

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