Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 420
mediumwhich fdls all space and yet does not hinder the motion of thestars and planets. Huygens assumed such a medium to exist,and called it the ether. The second difficulty in the way of the wave theory of• light was that it apparently failed to account for the fact ofstraight-line propagation.… … Chkistian lIiiYUKNS (1(;29-1«05) (Jixat Dut.h i.hvsuist. mathematidan, and astronomer; dis-covered th<- ri.iLiS of Saturn; made important in.provements inl,e telescpe; invente.l the pendulum clock (1G5G); develop..!ith marvelous insi,ht the ^^•ave theory of li^ht; discovered u.Im the…
Physics
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