Physics · 2019
JEE Main · 12 April 2019, Shift 1 · Q25
In a double slit experiment, when a thin film of thickness t having refractive index μ is introduced in front of one of the slits, the maximum at the…
In a double slit experiment, when a thin film of thickness t having refractive index $\displaystyle \mu$ is introduced in front of one of the slits, the maximum at the centre of the fringe pattern shifts by one fringe width. The value of t is ( $\displaystyle \lambda$ is the wavelength of the light used) :
Official answer
(3)
$\displaystyle \frac{\lambda}{(\mu-1)}$
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