A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 680 nm. Determine the angle that locates the first dark fringe when the width of the slit is each of the following.

Question

(b) 1.20 10-6 m

Answer 1

b•sinψ = k•λ.
sinψ = k•λ/b = 1•680•10^-9/1.2•10^-6 =
= 0.567
ψ = 34.52 degr