For Fraunhofer diffraction through a single slit, which of the following statements are correct?
Select all that apply

Question

For Fraunhofer diffraction through a single slit, which of the following statements are correct?

G1 Physics · Accepted Answer

Single-slit minima occur at a sinθ = mλ, where m = 1, 2, 3, ... Therefore A is correct. At θ = 0, all contributions from the slit arrive in phase, giving the largest possible amplitude. Hence the central maximum has the greatest intensity. So B is correct. Secondary maxima are much weaker than the central maximum and decrease in intensity for higher orders. Therefore C is false. The angular width of the central maximum is 2λ ÷ a. Thus decreasing a increases the angular width. Therefore D is cor…