MCQ
The figure shows a Young’s double slit experimental setup. It is observed that when a thin transparent sheet of thickness $t$ and refractive index $\mu $ is put in front of one of the slits, the central maximum gets shifted by a distance equal to $n$ fringe widths. If the wavelength of light used is $\lambda ,\,t$ will be
- A$\frac{{2nD\lambda }}{{a\left( {\mu - 1} \right)}}$
- B$\frac{{nD\lambda }}{{a\left( {\mu - 1} \right)}}$
- C$\frac{{2D\lambda }}{{a\left( {\mu - 1} \right)}}$
- ✓$\frac{{n\lambda }}{{\left( {\mu - 1} \right)}}$
