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: http://star.arm.ac.uk/~csj/pus/spectra/tot_l.html
Дата изменения: Fri Dec 19 15:20:00 1997
Дата индексирования: Tue Oct 2 07:45:40 2012
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Поисковые слова: universe
What can we learn about stars?
Light
is split into spectral colours, corresponding to wavelength.
Red light has long wavelengths, blue light has short wavelengths.
Spectra
from hot objects are continuous, like a rainbow
atoms only emit light of specific colours, revealing their
fingerprints as a line spectrum
atoms in front of a hot object absorb light at these colours, giving an
absorption spectrum