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Light of 500 nm falls on a 0.10 mm slit. First minimum at angle?
A5×10⁻² rad
B5×10⁻³ rad
C5×10⁻⁴ rad
D2×10⁻³ rad
Answer & Solution
Correct answer: B. 5×10⁻³ rad
Angle is λ/a = 500×10⁻⁹ / 1.0×10⁻⁴ = 5×10⁻³ rad.
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