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JEE Main 2022 · 26 Jul · Shift 1, Physics question 35

In Young's double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index 43\dfrac43, then the fringe width becomes (in mm) :

Choose one option
Answer and worked solution

Official answer: B

Fringe width falls by μ: 124/3=9\frac{12}{4/3}=9 mm.

(B)

Topics:Interference and Young's double slit
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