Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 228
an imperfect image. CHAPTER TV. THE UNDULATORY THEORY. 739. The Undulatory Theory of light has been alreadypresented.* Certain peculiar phenomena furnish theproof of its correctness and also show that the undulationsare transmitted. These are Interference, Double Refraction,and Polarization.… … 218 OPTICS. Two black glass mirrors, M and N,Fig. 258, are attached to each otherby a hinge s. One, M, is firmly-fixed, while the other, N, can bemoved a little distance forward, andis placed so as to make an anglevarying but little from parallel withM. Sunlight is admitted through aFig. 258.…
Physics
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