40. Light from a helium-neon laser (λ = 632.8 nm) is incident upon a 0.20-mm-wide slit. What is the total width of the central maximum 2.00 m from the slit?
(A)0.63 mm
(B)3.16 mm
(C)0.63 cm
(D)1.27 cm
(E)6.32cm
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統計: A(0), B(0), C(0), D(8), E(0) #3091958
統計: A(0), B(0), C(0), D(8), E(0) #3091958