History of Natural Philosophy From the Earliest Periods to the Present Time
History of Natural Philosophy From the Earliest Periods to the Present Time
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These were the colours exhibited by very thin films, either of a liquid (such as a soap-bubble), or of air, as when two glasses are laid together with only air OF NATURAL PHILOSOPHY. 253 between them. These colours were examined by Newton with a minuteness and care altogether un- exampled in experimental philosophy at that time, and with which few researches undertaken since will bear to stand in competition. Their result was a theory of a very singular nature, which he grounded on an hypothesi...s of what he termed fits of easy transmission and reflection ; and which sup- posed each ray of light to pass in its progress periodically through a succession of states such as would alternately dispose it to penetrate or be reflected back from the surface of a body on which it might fall. The simplest way in which the reader may conceive this hypothesis, is to regard every particle of light as a sort of little magnet revolving rapidly about its own centre while it advances in its course, and thus alternately presenting its attractive and repulsive pole, so that when it arrives at the surface of a body with its repulsive pole foremost, it is repelled and reflected ; and when the contrary, attracted, so as to enter the surface.
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To quickly assess the difficulty of the text, read a short excerpt:
These were the colours exhibited by very thin films, either of a liquid (such as a soap-bubble), or of air, as when two glasses are laid together with only air OF NATURAL PHILOSOPHY. 253 between them. These colours were examined by Newton with a minuteness and care altogether un- exampled in experimental philosophy at that time, and with which few researches undertaken since will bear to stand in competition. Their result was a theory of a very singular nature, which he grounded on an hypothesi...s of what he termed fits of easy transmission and reflection ; and which sup- posed each ray of light to pass in its progress periodically through a succession of states such as would alternately dispose it to penetrate or be reflected back from the surface of a body on which it might fall. The simplest way in which the reader may conceive this hypothesis, is to regard every particle of light as a sort of little magnet revolving rapidly about its own centre while it advances in its course, and thus alternately presenting its attractive and repulsive pole, so that when it arrives at the surface of a body with its repulsive pole foremost, it is repelled and reflected ; and when the contrary, attracted, so as to enter the surface.
What to read after History of Natural Philosophy From the Earliest Periods to the Present Time?
You can find similar books in the "Read Also" column, or choose other free books by Baden Powell to read onlineMoreLess
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