Light Source Spectrum Data

The emission spectrum of visible light arriving at the earth s surface from the sun.

Light source spectrum data. Double click the spectrum name or click the arrow to the right of the spectrum name to add the spectrum to the plotting window and the plotting legend. Full spectrum typically refers to the completeness of a light source s spectral energy particularly when compared to natural light sources such as natural daylight. White light can be generated by a variety of sources both in space and by artificial sources on earth. About light most objects in space give off radiate light.

Visible light comprises only a tiny fraction of the entire electromagnetic radiation spectrum yet it contains the only region of frequencies to which the rods and cones of the human eye will respond. Relative spectral power distributions spds of cie illuminants a b and c from 380 nm to 780 nm. The 175w xe light source xe spectrum is a compact and light weight high intensity light source. The sun is the most obvious.

The exact spectral composition of a light source can only be determined by specialized photometric equipment such as a spectrometer. Click once on the name of a spectrum in the data input section to preview the spectrum in the plotting window in light gray. The emission spectrum for natural light generally follows the planck distribution in the visible part of the spectrum as we can see below. The wavelengths that humans are typically able to visualize lie in a very narrow range between approximately 400 and 700 nanometers.

A standard illuminant is a theoretical source of visible light with a profile its spectral power distribution which is published. It is especially suitable as a light source for spectroscopy microscopy optical scanning and industrial uses as well as for use with sp s popular digikröm monochromators and spectrographs. This light is given different names depending on its wavelength and energy radio waves long wavelength low energy microwaves infrared visible light ultraviolet x rays and gamma rays short wavelength high energy.