Helium-Neon Laser Light (λ = 632

Multiple Choice

Helium-neon laser light (λ = 632.8 nm) is sent through a single slit of width 0.41 mm.What is the width of the central maximum on a screen 1.0 m in back of the slit? (1 nm = 10−⁹ m)

A) 5.3 mm
B) 4.2 mm
C) 3.1 mm
D) 2.0 mm