Answer to Question #49308 in Engineering for mohd anas

Question

A plane diffraction grating is illuminated with a monochromatic light of wavelength 5100 Å. If the angle of diffraction for third order maxima is 22.5o, calculate the number of lines in one inch of the grating surface. Also, if this grating is illuminated with another light of wavelength 5200 Å, then find the angle of separation of 5100 Å and 5200 Å lines in second order spectrum.