(a) Sunlight passes through a diffraction grating. What is the greatest number of lines per inch in the grating for which complete first-, second-, and third-order visible spectra can be observed on a flat screen parallel to the grating? (Assume that the visible light includes Fiber 400 nm < 8 < 750 nm. )
(b) Sunlight is incident on a diffraction grating with the number of lines per inch you found in part (a). The spectrum created falls on a screen 3.00 m from the diffraction grating. Determine the distance from the central maximum to the yellow-green line formed by 550 nm light in each of the three spectra.