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In a Young's experiment, two coherent so...

In a Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be:

A

500 nm

B

600 nm

C

450 nm

D

400 nm

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