Question: 57. Monochromatic light passes through a single slit with a width of 8.2 x 10 *m. The third dark fringe (minimum) falls at an angle

 57. Monochromatic light passes through a single slit with a width

57. Monochromatic light passes through a single slit with a width of 8.2 x 10 *m. The third dark fringe (minimum) falls at an angle of 15" from the centre line. Determine the wavelength of the light in nanometres. (10.2)

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