Young's double slit experiment is first performed in air and then in a medium other than air. It is found that $8^{th}$ bright fringe in the medium lies where $5^{th}$ dark fringe lies in air. The refractive index of the medium is nearly :

Question

Dr. Abubacker · Accepted Answer

[Solution] $8\lambda D/(\mu d) = 4.5\lambda D/d$, so $\mu = 8/4.5 \approx 1.78$. Answer (4).

Q. Young's double slit experiment is first performed in air and then in a medium other than air. It is found that $8^{th}$ bright fringe in the medium lies where $5^{th}$ dark fringe lies in air. The refractive index of the medium is nearly :

Explanation

Reviewed by Dr. Abubacker

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