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Astro- Ch.7 Atoms and Starlight- Quiz 2/3
Terms in this set (14)
The energy stored in an object as agitation among its atoms and molecules.
Energy flowing from a warm body to a cool body by the agitation of particles such as atoms or molecules.
A measure of the velocity of random motions among the atoms of molecules in a material.
Kelvin temperature scale
The temperature, in Celcius (centigrade) degrees, measured above absolute zero.
The lowest possible temperature; the temperature at which the particles in a material, atoms or molecules, contain no energy of motion that can be extracted from the body.
Radiation emitted by a hypothetical perfect radiator; the spectrum is continuous, and the wavelength of maximum emission depends only on the body's temperature.
wavelength of maximum intensity
The wavelength at which a perfect radiator emits the maximum amount of energy; depends only on the object's temperature.
A spectrum in which there are no absorption or emission lines.
A spectrum containing emission lines (also known as a bright-line spectrum).
A bright line in a spectrum caused by ultraviolet radiation from hot stars.
A spectrum that contains absorption lines. (Also known as a Dark Line Spectrum)
A dark line in a spectrum; produced by the absence of photons absorbed by atoms or molecules.
A set of laws that describe the absorption and emission of light by matter.
The movement of an electron from one atomic orbit to another.
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