emission spectrum is the relative intensity of electromagnetic radiation of each frequency it emits when it is heated (or more generally when it is excited). When the electrons in the element are excited, they jump to higher energy levels. As the electrons fall back down, and leave the excited state, energy is re-emitted, the wavelength of which refers to the discrete lines of the emission spectrum. Note however that the emission extends over a range of frequencies, an effect called spectral line broadening.
An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives rise to dark lines (absence of light) in the spectrum. The light emitted from an excited atom can not be directed toward the observer, so the light appears to be missing from the continuous spectrum.
Here I give you a very simple example. If an object emit a red color (630–700 nm) and nothing otherwise in a dark room, you see a red object. On the other hand, if an object absorb ALL the read color under sun light, you see an object with all color mixed except red, or a green-wish color.
2007-10-30 06:05:40
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answer #1
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answered by Hahaha 7
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at the same time as the atoms of the progression a heated they benefit skill and shift from floor state to existed state. in this state they're volatile and they fall back to their initial state wth emmision of light of diverse frequencies. because of the very actuality those electrons are of diverse atoms they dont posses the similar floor state skill and neither do they after absorption of skill. this signifies that they dont carry about one very very last skill factor accordingly they emit person-friendly of diverse frequencies, its this huge distinction in emmision that evidences the version in skill factor skill accordingly proving the life of skill degrees in atoms
2016-10-23 03:34:36
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answer #2
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answered by ? 4
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