3.

A single slit that is 2100 nm wide forms a diffraction pattern when illuminated by monochromatic light of 680-nm wavelength. At an angle of 10 from the central maximum, what is the ratio of the intensity to the intensity of the central maximum? 0 |X|O= 0.35 O |X|O= 0.39 O |X|O= 0.43 O |X|O= 0.47 A grating with 7000 lines per centimeter is illuminated by a monochromatic light. Determine the wavelength of the light in nanometers if the second order maximum is at 539. Please give the answer with no decimal places