Carbon dating radiation type

If with superhuman eyes you could see beyond red, you would encounter the "infrared" -- felt as heat on the skin -- which would merge gradually into the familiar "radio" portion of the spectrum.

Astronomers produce spectra by means of a "spectrograph" affixed to the telescope.The differing kinds of radiation simply have different wavelengths, that is, the separations between crests in two successive waves.Visual radiation is in the middle, with wavelengths that extend from 0.00004 centimeters for violet light to about 0.00007 centimeters for extreme red.As a result shorter visual waves refract more than do longer ones.Refracted light is therefore "dispersed" or spread out into its spectrum, creating a rainbow -- or the spectrum of a star.Refraction by a curved lens focuses radiation to create an image.Turned to the sky and attached to a detector, the lens becomes an astronomical telescope.Shorter-wave photons have increasingly potent effects. Infrared is felt as heat, visual radiation excites the chemistry of the eye, ultraviolet burns, and no one wants to stand in front of an active X-ray machine for long.A single gamma ray photon can carry the energy of over a million million million radio photons.The oldest form of the device was visual (a spectro SCOPE), and consisted of little more than a prism in a tube fixed to the end of the telescope, the refracted light focused by an observer's eyepiece.By the turn of the 20th century, spectra were being recorded photographically.

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