Science / Chemistry / Spectrum: 1. A sequence of colors produced by passing light through a prism or diffraction grating. 2. A range of wavelengths of electromagnetic radiation. 3. A plot that shows how some intensity-related property of a beam of radiation or particles depends on another property that is related to dispersal of the beam by a prism, a magnet, or some other device. For example, a plot of light absorbance vs. Wavelength is an absorption spectrum; a plot of ion abundance vs. Mass is a mass spectrum.

Absorption Spectrum

Science / Chemistry / Absorption Spectrum: A plot that shows how much radiation a substance absorbs at different wavelengths. Absorption spectra are unique for each element and compound and they are often used as chemical 'fingerprints' in ana MORE

Electromagnetic Spectrum

Technology / Cell Phones / Electromagnetic Spectrum: The collection of all electromagnetic energy arranged according to frequency and wavelength. MORE

X-Ray Spectrum

Science / Chemistry / X-Ray Spectrum: A set of characteristic x-ray frequencies or wavelengths produced by a substance used as a target in an x-ray tube. Each element has a characteristic x-ray spectrum, and there is a strong correlation MORE