The Boston school compendium of natural and experimental philosophy .. (1837)
Parker, Richard Green, 1798-1869 · Boston : Marsh, Capen & Lyon · leaf 145
it reallyis, on account of the refraction of the denser medium. 353. What are the three fundamental laws of dioptrics? First? Second?Third? Illustrate the first rule by the line at B, in fig. 104. Illustrate the sec-ond rule by the line C B. Illustrate the third rule by the line F B. In what… … OPTICS. 135 For the same reason, when we look obliquely upon a body of wa-ter it appears more shallow than it really is. Bat when we lookperpendicularly downwards, from a boat, we are liable to no suchdeception, because there will be no refraction. Let a piece of money be put into a cup or a bowl,…
Physics
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