Spekter

the spectrum of radiation describes its composition with regard to wavelength; light, for example, as the portion of electromagnetic radiation that is visible to the human eye, is radiation with wavelengths in the range of approx. 380 to 780 nm (1 nm = 10 m); the corresponding range of colours varies from violet to indigo, blue, green, yellow, orange, and red; these colours form a continuous spectrum, in which the various spectral sectors merge into each other