Physics · 2013
JEE Main · 25 April 2013, Shift 1 · Q6
A thin glass plate of thickness 2500/3 λ(λ is wavelength of light used) and refractive index μ=1.5 is inserted between one of the slits and the…
A thin glass plate of thickness $\displaystyle \frac{2500}{3} \lambda(\lambda$ is wavelength of light used) and refractive index $\displaystyle \mu=1.5$ is inserted between one of the slits and the screen in Young's double slit experiment. At a point on the screen equidistant from the slits, the ratio of the intensities before and after the introduction of the glass plate is :
Official answer
(3)
$\displaystyle 4$ : $\displaystyle 1$
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