Optical Diffraction Grating
Intensity distribution of (monochromatic) light of wavelength λ diffracted through an optical lattice.
See also:
Gitterspektrum
http://www.geogebra.org/de/upload/files/dynamische_arbeitsblaetter/lwolf/spektrum/spektrum.html
created by C. Wolfseher
http://katgym.by.lo-net2.de/c.wolfseher/