In a young's double slit experiment, two...

In a young's double slit experiment, two slits are illuminated by a mixture of two wavelength `12000Å` and `10000Å`. At 6.0 mm from the common central bright fringe on a screen 2 m away from the slits, a bright fringe of one interference pattern coincides with the bright fringe of other. Distance between the slits should by :

1.0mm

1.5mm

2.0mm

2.5mm

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