JEE Main 2026 Physics question
In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4 μm. If the experiment is carried out in another medium having refractive index 1.2, the fringe width will be μm.
Answer: (B)
Solution
Fringe width β=λD/d ∝ 1/μ in a medium. β' = 2.4/1.2 = 2.