Wright, Mark R., 1854- · London : Longmans · leaf 136
wall and et the sunlight or a lantern beam fall upon it. The colours blend and grey light is formed. If the colourswere perfect and the light strong enough, white light would befornjed. Fasten pieces of black paper over any of the sectors, say theblue ; spin and note the reddish tint; cover the red… … Fig. 116. A carbon di^ulphide prism is better than one of glass, and aslit is preferable to a hole. Place on the lantern a cap with a slit\y.^ and focus this on a screen. S (fig. 116) is the slit, M aconvex lens focussing the slit ats. Now interpose the carbon 128 Light disulphide prism P Q R. The…
Physics
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