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How to use spectra in a sentence
The spectra of the metals of the alkaline earths are equally definite, though more complicated.COOLEY'S CYCLOPDIA OF PRACTICAL RECEIPTS AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES..., SIXTH EDITION, VOLUME IARNOLD COOLEY
It is science when the astronomer compares the spectrum of the sun with the spectra of various metals in the laboratory.THE ASTRONOMY OF THE BIBLEE. WALTER MAUNDER
Gamma-ray spectra are collected all day, first from a sample, then from its accompanying standard.THE ATOMIC FINGERPRINTBERNARD KEISCH
The two gamma-ray spectra you obtain look like those in the figure on the opposite page.THE ATOMIC FINGERPRINTBERNARD KEISCH
Spectra of stars, per contra, appear relatively simple, since their feeble light is insufficient to bring out faint details.A TEXT-BOOK OF ASTRONOMYGEORGE C. COMSTOCK
The planetary nebul all have spectra of this kind and make up about half of all the known gaseous nebul.A TEXT-BOOK OF ASTRONOMYGEORGE C. COMSTOCK
On the other hand, the red stars, like Orionis and Scorpii, show spectra with several broad bands.THE POPULAR SCIENCE MONTHLY, SEPTEMBER, 1900VARIOUS
The spectra of this class consist principally of three bright bands, which are separated by dark intervals.THE POPULAR SCIENCE MONTHLY, SEPTEMBER, 1900VARIOUS
It is found, however, that there are star spectra of types intermediate to all these defined.THE POPULAR SCIENCE MONTHLY, SEPTEMBER, 1900VARIOUS