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spectroscopy
analysis of light emitted or absorbed by substances
amplitude
height of wave above center line
wavelength and radiation type
0.01-10nm x-ray
10-400nm UV
400-700nm visible light
700-1,000,000nm infrared
1,000,000-1,000,000,000nm microwaves
>1,000,000,000nm radio waves
diffraction pattern
peaks and troughs interfere with peaks and troughs of waves traveling along another path
constructive interference
peaks of one wave coincide and amplitude is enhanced
destructive interference
peaks of wave coincide with troughs of another wave and amplitude is diminished