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  3. Physics
  4. A thin glass plate of thickness is (2500/3) λ (λ is wavelength of light used ) and refractive index μ = 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 :

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Q. A thin glass plate of thickness is $\frac{2500}{3} \lambda$ $(\lambda $is wavelength of light used ) and refractive index $\mu = 1.5$ 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 :

JEE MainJEE Main 2013Wave Optics

Solution:

Correct answer is (c) 4 : 1