A parallel beam of monochromatic light of wavelength 600 nm passes through single slit of 0.4 mm width. Angular divergence corresponding to second order minima would be 10-3 rad.
6
[figure]
2nd minimum: a = 2 2 a
= 2 600 10-90.4 10-3 = 3 10-3 rad
minima lie on both sides of the centre, angular divergence = 2
= 6 10-3 rad
Answer: 6
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