Back to RAY OPTICS

JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

Two transparent slabs having equal thickness but different refractive indices

\mu_1

and

\mu_2

are pasted side by side to form a composite slab. This slab is placed just after the double slit in a Young's experiment so that the light from one slit goes through one material and the light from the other slit goes through the other material. What should be the minimum thickness of the slab so that there is a minimum at the point

P_0

which is equidistant from the slits?

View answer and explanation

Correct option: A

\frac{\lambda}{2\left(\mu_1-\mu_2\right)}

Option A (

\frac{\lambda}{2(\mu_1-\mu_2)}

) is correct because the minimum thickness is found by equating the path difference to

\lambda/2

for a minimum at P0.

More Questions from RAY OPTICS

Practice All Chapter MCQs →

In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium A double convex lens is made of glass which has its refractive index 1,45 for violet rays and 1.50 for red rays. If the focal length for violet ray is

20 \mathrm{~cm}

, the focal length for red ray will be Which light rays undergoes two internal reflection inside a raindrop, which of the rainbow is formed? A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are A dentist has a small mirror of focal length

16 {~mm}

. He views the cavity in the tooth of a patient by holding the mirror at a distance of

8 {~mm}

from the cavity. The magnification is All of the following statements are correct except