A diifraction grating has `5000` lines per cm. What is the grating element ?

A diffraction greating has 5000 lines per cm. what is its greating element?

A diffraction garating has 5,000 rulings per centimetre. What is the second order diffraction angle for violent light ( lamda = 500 nm).

Light from two sources, lambda_(1)= 623 nm and lambda_(2) = 488 nm , is incident on a diffraction grating that has 5550 "lines" // cm . What is the angular separation, lambda_(1)-lambda_(2) of the second order maxima of the two waves?

A. diffraction grating has 800 lines per mm and is illuminated normally by parallel monochromatic light of wavelengths 560 nm and 590 nm. Calculate the difference in the angular positions of the first order spectra of the two lights on th same suide of the normal.