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ch. 7: Photometry and Spectroscopy


brightness of source is measured through each of a set of standard filters


splits light source into components of light

ground state

the lowest energy state an electron can have w/o an atom

balmer series

transmissions from the 2nd energy level up-only transistions at visible wavelengths

spectral type

order stellar spectra by type (0-9)


1 brightest, 6 faintest

color index

color gives an estimate of the temp

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