In Young's experiment with d = 1 mm, D = 1 m, light wavelength 600 nm, fringe width is:
A0.06 mm
B0.6 mm
C6 mm
D60 mm
Answer & Solution
Correct answer: B. 0.6 mm
β = λD/d = (600 × 10⁻⁹)(1)/(10⁻³) = 6 × 10⁻⁴ m = 0.6 mm.
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