Optics Question 1084

Question: In Young’s experiment, light of wavelength 4000 Å is used to produce bright fringes of width 0.6 mm, at a distance of 2 meters. If the whole apparatus is dipped in a liquid of refractive index 1.5, then fringe width will be

[MP PMT 1994]

Options:

A) 0.2 mm

B) 0.3 mm

C) 0.4 mm

D) 1.2 mm

Show Answer

Answer:

Correct Answer: C

Solution:

$ {\beta _{medium}}=\frac{{\beta _{air}}}{\mu }=\frac{0.6}{1.5}=0.4\ mm $ .



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