Gilley, Frank M · Boston, Allyn & Bacon · leaf 286
308. Kaleidoscope. — Place two mirrors facing each other andmeeting at an angle of 60°. Push a pencil between them. Putseveral coins, beads, or bits of colored paper between them,and note the appearance of the reflections. This forms akaleidoscope, the construction of which is somewhat like… … Fig. 245. scope is made of two layers of glass, with beads between them;the outer layer is usually of ground glass. A covering iswrapped around the mirrors, covering the __ _-^ open space betweenthe edges of the mir-rors. The observerlooks in at the openend. On turning theapparatus the beadsfall…
Physics
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