Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 190
produced as far away as is the screen on which we wisli to have the spectrum. Then a prism is placed in the path, and the spectrum appears on the screen. You should notice, however, that this is the spectrum of theelectric light (or whatever light we are using in the lantern),not of sunlight. Each… … TT Fio. 215.—Showing how to produce a purespectrum. COLOURS OF NATURAL OBJECTS 183 213. Colours of Natural Objects. If you look through apiece of red glass at a candle or at the sky, these objectsappear red. A piece of ribbon, examined in ordinary lightlooks red. Let us try to find out the reason…
Physics
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