In case of black body radiations black-body radiation, radiations giveradiation gives continuous spectra . Molecular spectra is an example of band spectra . Similarly, there's also the atomic spectra . Why are the spectra of light is not same in all cases ?
Improved on previous grammatical edits, clarified question & added additional relevant tags
docscience
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Copy edited (e.g. ref. <http://english.stackexchange.com/questions/4645/is-it-ever-correct-to-have-a-space-before-a-question-or-exclamation-mark#comment206109_4645>).
Peter Mortensen
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