Physics · 2019
JEE Main · 9 April 2019, Shift 1 · Q24
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 μ is…
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 $\displaystyle \mu$ 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 $\displaystyle \boldsymbol{\lambda}$, $\displaystyle \mathbf{t}$ will be :
Official answer
(2)
$\displaystyle \frac{\mathrm{nD} \lambda}{\mathrm{a}(\mu-1)}$
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