Question

For a single slit of width a, the diffraction pattern minima are located at angles θ_m, where m is a positive, non-zero integer. Which of the following expressions is most correct ? 

(A) a sin θ_m = mλ 

(B) a sin θ_m = \(\cfrac{mλ }2\)

(C) a sin θ_m = (2m + 1)\(\cfrac{λ }2\)

(D) a sin θ_m = (2m – 1)\(\cfrac{λ }2\)

Answer 1

(A) a sin θ_m = mλ