Orange light (wavelength=600nm) is passes through a single slit. Use a=2000nm and L=2m.

a) Determine the linear size on the screen of the 2nd maximum (not including the central maximum).
b) Determine how many total maxima occur in the pattern.

a) I thought for a single slit, the equation would be y=WL*m*L/a, but my answer comes out incorrect. The answer is 2.64m
b) I have no idea but the answer is 5.