WordNet
n. spectrum of electromagnetic radiation emitted by a self-luminous source
Wikipedia
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify the elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.
Usage examples of "emission spectrum".
Mallet observed that the light had a continuous spectrum instead of having 'dark lines' which are characteristic of emission spectrum.
Which is why, Honor, if you spot this emission spectrum, your new orders are to give complete priority to getting us that closer look.
Finally Baloyne asked how, then, Lerner explained the circular repetition of the signal, and the fact that all the rest of the emission spectrum for neutrino radiation in the sky was ordinary noise, while in that single, solitary band lay so much information.
This speed varies depending upon the emission spectrum of the planar field, but is never less than 5.
This information puzzled me at first because I remembered that the emission spectrum of the lasers that destroyed our probes was different.
We'll get enough burn to give us an emission spectrum for the points of impact, but we'll be touching less than a billionth of the total area.
Jupiter's moon Ganymede had been detected by radar, and the radio-emission spectrum of another Jovian moon, Callisto, had been elaborated.