In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths 1 = 12000 and 2 = 10000 . 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?

1. A. 8 mm
2. B. 6 mm
3. C. 4 mm
4. D. 3 mm

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