Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
able of transmitting only thosevibrations of light which move in a single plane, or those undulationswhich can be resolved into that plane. Other bodies, which are them-selves capable of vibrating in two directions, reduce all the vibrationswhich they transmit to vibrations in the two planes in… … 514. Figure 42. —Action of tourmaline on ordinary-light.—Let EF be two tourmaline plates symmetrically held, and the 19 290 OPTICS. arrow, A, a ray of light; and, as shown, the ray will pass through bothplates. If now one of the plates, as T, be turned a quarter round, a&shown, a ray of light,…
Physics · Astronomy
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