central maximum?

Question

Light of wavelength 598 nm illuminates a single 0.77 mm wide slit. At what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 2.03 mm from the central maximum?

What is the width of the central maximum?

im not sure where to start

Answer 1

Use the single-slit diffraction equation (see ref.).
y = m*lambda*D/a
D = a*y/(m*lambda) = 2.6139 m.