An 18 Mm Wide Diffraction Grating Has Rulings of 710

Multiple Choice

An 18 mm wide diffraction grating has rulings of 710 lines per mm.Light is incident normally on the grating.Monochromatic light of 506 nm wavelength is used.The largest angle from the normal at which an intensity maximum is formed is closest to:

A) 46°
B) 44°
C) 42°
D) 40°
E) 38°