plural of optical spectrum

The various political viewpoints represented as a continuum, ranging from the extreme left to the extreme right.

plural of political spectrum

(physics) A spectrum, typically produced by a luminous gas, that consists of separate lines typical of particular elements

plural of absorption spectrum

Britain spelling of spectrum analyzer

(physics) An electronic device that displays the frequency spectrum of an electrical, optical or acoustic waveform.

(physics) The entire range of wavelengths of all known electromagnetic radiations extending from gamma rays, to X-rays through visible light, infrared, to radio waves.

The colours of the rainbow. / (physics) The distribution of colours produced when white light passes through a prism. / (astronomy, physics) The range of frequencies of visible light.

(physics) The portion of the electromagnetic spectrum that is visible to humans. / (physics) an extension of the human-visible spectrum to include near-visible wavelengths, primarily near infrared.