In Young's experiment, slits 0.5 mm apart and a screen 1 m away are lit by 500 nm light. What is the fringe width?
A0.5 mm
B2 mm
C0.25 mm
D1 mm
Answer & Solution
Correct answer: D. 1 mm
Fringe width = lambda D / d = (500e-9 x 1)/(0.5e-3) = 1e-3 m = 1 mm.
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