In Young’s double slit experiment, distance between two sources is 0.1 mm. The distance of screen from the sources is 20 cm. Wavelength of light used is 5460 Å. Then angular position of the first dark fringe is
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a
0.08∘
b
0.16∘
c
0.20∘
d
0.313∘
answer is D.
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Detailed Solution
Angular position of first dark fringeθ=λd=5460×10−100.1×10−3×180π (in degree) = 0.313°
In Young’s double slit experiment, distance between two sources is 0.1 mm. The distance of screen from the sources is 20 cm. Wavelength of light used is 5460 Å. Then angular position of the first dark fringe is