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-- See Also the narrower term Color

-- See Also the narrower term Diffraction

-- See Also the narrower term Electroluminescence

-- See Also the narrower term Interference (Light)

-- See Also the narrower term Light absorption

-- See Also the narrower term Light filters

-- See Also the narrower term Luminescence

-- See Also the narrower term Optical detectors

-- See Also the narrower term Optical pumping

-- See Also Optics

--headings beginning with the word Optical

-- See Also the narrower term Photobiology

-- See Also the narrower term Photons

-- See Also Spectrum analysis

--subdivision Spectra under individual chemicals, materials, elementary particles, and celestial bodies, e.g. Copper--Spectra; Metals--Spectra; Protons--Spectra; Stars--Spectra

-- See Also the narrower term Transillumination