Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 441
MAGE FORMATION Since, however, reflection took place at mn, and since thereflected wave is propagated backward with exactly the samevelocity with which the original Avave would have been prop-agated forward, at the proper instant the reflected wave musthave reached the position of the line cojd^ so…
Physics
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