Question

In Young’s double slit experiment, the slits are 2 mm apart and
are illuminated by photons of two wavelengths ????₁ = 12000Å
and ????₂ = 10000Å. At what minimum distance from the common
central bright fringe on the screen 2 m from the slit will
a bright fringe from one interference pattern coincide with a
bright fringe from the other ? [2013]
(a) 6 mm (b) 4 mm
(c) 3 mm (d) 8 mm

Answer 1

6 mm is correct answer..

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