spectra

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Examples

• Just turn down the lights, or place filters on LEDs that narrow the spectra of light they shine down.

• The spectra of light coming from spiral nebulae was similar enough to that of the Milky Way that they could be similar objects, he maintained.

• It includes light spectra for more than three million astronomical objects.

• Stars also have distinctive spectra, determined by their temperature, size, and, to a lesser degree, their chemistry.

• The result is a mosaic of spectra, covering up to 60 different regions.

• The spectra of the metals of the alkaline earths are equally definite, though more complicated.

• It is science when the astronomer compares the spectrum of the sun with the spectra of various metals in the laboratory.

• Gamma-ray spectra are collected all day, first from a sample, then from its accompanying standard.

• The two gamma-ray spectra you obtain look like those in the figure on the opposite page.

• Spectra of stars, per contra, appear relatively simple, since their feeble light is insufficient to bring out faint details.