1. The problem statement, all variables and given/known data A diffraction grating is ruled with 500 lines/mm and is 1 mm in width. Calculate the angular width of the intensity peaks to the first minimum in the Fraunhofer diffraction pattern of this grating, when illuminated with light of λ = 600 nm. 2. Relevant equations n- order, d separation of slits nλ = dsinθ Single slit function ψ(θ)=Aa sinc (kθa/2) (not sure if relevant) A-amplitude, a -width of the slit k = 2π/λ b = 1mm the width of the 3. The attempt at a solution TBH, I am not really sure what do they mean by angular width ( I assume θ). But I was not sure how to attempt this problem. I was thinking of convolving f(x) = ...+ δ(x+ 2d)+δ(x+d)+δ(x)+δ(x-d)+δ(x-2d)+... [the infinite array of slits of negligible width] with g(x) = (from -b/2 to b/2)∫dx [the width of the grating] and then looking for zeros of intensity, from which I can tell the θ. Does this sound correct ?