Optics 6 Question 28
30. A narrow slit of width is illuminated by monochromatic light of wavelength . The distance between the first minima on either side of a screen at a distance of is
(1994, 1M)
(a)
(b)
(c)
(d)
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Solution:
- For first dark fringe on either side
Therefore, distance between two dark fringes on either side
Substituting the values, we have