Light of wavelength meters strikes a diffraction grating ruled with k lines per meter. The angular deviation of the first order diffraction maximum, is given in terms of and k by the expression

k = sin .

1. If k = 7500 lines per cm, at what angle, to the nearest degree, would you find the first order maximum for green light of wavelength 500 millimicrons? A micron is a millionth of a meter. Therefore, 500 millimicrons = 500 nanometers = 5 x 10² x 10^-9 m = 5 x 10^-7 m

2. If the diffraction grating in Problem 1 is used, what is the wavelength of light for which the diffraction angle is 30 degrees?