In a Young\'s experiment, two coherent sources are placed `0.90mm` apart and the fringes
Channel: Doubtnut
Date: 2020-01-19

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