d from the sun or any luminousbody, is a compound of differenUy colored lights and may bedecomposed, analyzed, or^ separated into its elementary partsby two methods, viz :— 1st. By Refraction. 2nd. By Absorption. KEWTON S SPECTRUM.Newtons spectrum. 69 171. Light is decomposed bj refraction by… … 172. When a rayof light is thus de-composed, its ele-mentary constitu-ents arrange them-selves on thescreen so as toform an elongatedcolored figure, called the Pris-matic Spectrum. Thus, S His a ray of white light passing through a small hole in theshutter E F, and then through the triangular glass…
Physics
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