In Young's double slit experiment with sodium vapour lamp
of wavelength 589 nm and the slits 0.589 mm apart, the half
angular width of the central maximum is
(a) sin⁻¹ 0.01 (b) sin⁻¹0.0001
(c) sin⁻¹ 0.001 (d) sin⁻¹ 0.1
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The answer is (c) sin⁻¹ 0.001
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Explanation:
sinθ
= λ / d
= 589×10 ^ - 9 / 0.589×10^−3
=10 ^−3
−3
−3 θ=sin^−1 (0.001)
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