Continuous spectrum

Definition

A continuous spectrum is a range of emitted or absorbed electromagnetic radiation that contains all wavelengths within a given limit. Unlike line spectra, it does not have any gaps or lines indicating discrete wavelengths.

5 Must Know Facts For Your Next Test

1. A continuous spectrum results from the emission of light from a blackbody radiator.
2. It includes all wavelengths of light within the visible range and beyond, such as ultraviolet and infrared.
3. Continuous spectra are produced by incandescent solids, liquids, and densely packed gases.
4. The Sun's spectrum is an example of a continuous spectrum with some superimposed absorption lines (Fraunhofer lines).
5. Continuous spectra contrast with line spectra, which show only specific wavelengths corresponding to electron transitions in atoms.

Review Questions

• What type of materials typically produce a continuous spectrum?
• How does a continuous spectrum differ from a line spectrum?
• Name an astronomical example where you can observe a continuous spectrum.

Related terms

Line Spectrum: A series of discrete wavelengths emitted or absorbed by atoms and molecules during electronic transitions.

Blackbody Radiation: The electromagnetic radiation emitted by an idealized object that absorbs all incident radiation and re-emits it uniformly across all wavelengths.

Fraunhofer Lines: Dark lines in the solar spectrum caused by the absorption of specific wavelengths by elements in the Sun's atmosphere.