Physics (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Physics

In what follows I shall try to review very briefly the principal ideas upon which modern physics rests and shall say something about where we think we have arrived in our search for knowledge. I need scarcely remind you that in the natural sciences as in more practical afi' airs, how we have arrived is as important as where we have arrived. I Shall therefore spend some time in presenting detached fragments of the experimental evidence and inferences upon which certain conclusions are based, hoping in this way to illustrate some of the constructive methods of reasoning employed in research.

The ideas which underlie all our thinking are space, time and inertia or mass. With space and time as a back ground, the physicist must pursue inertia and everything related to it, along every conceivable path. In this pursuithe comes upon four ultimate though related conceptions Matter, Ether, Electricity and Energy.

The historical development of these conceptions cannot even be sketched in such a lecture as this, but it should be remembered an important part of our present knowledge of matter, and nearly all that we know Of the ether and electricity, has been gained not immediately but by inf er ence. In so many cases we see or know directly only the first and last link Of a chain of events and must search by indirect means for the mechanism lying between.

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