By Lilley

Researching Relativity for your self explains Einstein's thought of Relativity to readers who're daunted by way of the normal mathematical method of that profound idea. For 20 years Sam Lilley taught this topic to adults with out technological know-how historical past. Now he has written a proof of the idea that calls for no previous wisdom of arithmetic or physics past a capability to do simple math. the 1st region of the publication makes use of not more than mathematics and a bit easy geometry to introduce a few of the major ideas of the speculation, in addition to discussing a magnificent experimental attempt, which comes down strongly in its favour. while finally additional development calls for use of algebra and different mathematical innovations, those are rigorously defined in a manner that makes them available to absolute newcomers, utilizing many new and unorthodox equipment.

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**Example text**

And therefore, the message 5 sends telling him that if sets his clock back one minute, then their clocks will agree. , all of whom 5 and all are at rest WITH RESPECT TO , set their clocks to agree with that of S , by the same method of signals described above. They would all say then that all their clocks are in agreement. Whether this is absolutely true or not, they cannot tell (see above), but that is the best they can do. Now let us when these observers wish see what will happen to measure the length of something.

And, as we saw, whereas the Lorentz transformation really expressed the facts correctly, it seemed to have NO PHYSICAL MEANING, *See the article on Relativity in the Encyclopedia Britannica, 14th edition. 19 and was merely a set of empirical equations. Let us now see what Einstein did. RE-EXAMINATION OF THE III. FUNDAMENTAL IDEAS. As Einstein regarded the situation, the negative result of the Michelson-Morley experiment, as well as of other experiments which seemed to indicate a "conspiracy" on the part of nature against man's efforts to obtain knowledge of the physical world (see p.

5), these negative results, according to Einstein, did not merely demand explanations of a certain number of isolated difficulties, but the situation was so serious that a complete examination of fundamental ideas was necessary. In he other words, felt that there was something fundamentally and radically wrong in physics, rather than a And mere superficial difficulty. so he undertook to re-examine such fundamental notions as our ideas of LENGTH and TIME and MASS. His exceedingly reasonable examination 20 is most illuminating, as we But shall first why now let us see.