Line overlap is a common problem, bearing in mind that the spectrum of a complex mineral can contain several hundred measurable lines.

The spectrum for more distant objects will contain more modulation.

In this case the spectrum does no longer consist of eigenvalues alone and can contain a continuous component.

The spectrum contains all of the wavelengths of light that we can see.

Thus, spectra of this nature contain many features that have to be accounted for and understood.

On our scale, the electromagnetic spectrum contains energies at different frequencies that do not interfere with each other.

On a half line the spectrum contains boundary bound states in addition to the solitons and breathers.

It is not used for testing loudspeakers as its spectrum contains too great an amount of high frequency content.

Thus the spectrum of an operator always contains all its eigenvalues, but is not limited to them.

"Because the spectra contained wavelengths of both matter and antimatter."