In young's double-slit experiment, the s...

In young's double-slit experiment, the slit are 2 mm apart and are illuminated with a mixture ot two wavelengths `lambda_(0) = 750 nm` and `lambda = 900 nm`, The minimum distance from the common central bright fringe on a screen 2 m from the slits, where a bright fringe from one interference pattern coincides with a bright fringe from the other, is

1.5 mm

3 mm

4.5 mm

6 mm

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In Young's double-slit experiment, the slits are 2mm apart and are illuminated by photons of two wavelengths lambda_1=12000Å and lambda_2=10000Å . At what minimum distance from the common central bright fringe on the screen 2m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?

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