JEE Main 2022 · 29 Jun · Shift 1 · Physics Q49

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PhysicsSingle correct+4 / -1Question 49 of 90

Using Young's double slit experiment, a monochromatic light of wavelength 5000 Å produces fringes of fringe width 0.5 mm. If another monochromatic light of wavelength 6000 Å is used and the separation between the slits is doubled, then the new fringe width will be :

0.5 mm

1.0 mm

0.6 mm

0.3 mm

Answer and worked solution

Official answer: D

Fringe width $\propto\frac\lambda d$ : $0.5\times\frac65\times\frac12=0.3$ mm.

(D)

Topics:Interference and Young's double slit

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JEE Main 2022 · 29 Jun · Shift 1, Physics question 49