Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led to the development of his special theory of relativity. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequent theory of gravitation in 1916, he published a paper on the general theory of relativity.

He continued to deal with prob...

THIS BOOK is not intended as an abstruse scientific work, but the statement of a new theory, and its comparison with the old ones for the instruction of the masses. It is well said, " every age has its predominant thought."

That of Greece was beauty, and she excelled in sculptured grace of statue and temple ; that of Rome was power and she conquered the world ; that of the sixteenth century was reform, and states and religions were torn into warring fections ; that of the eighteenth century w...

"I don’t want to bore you with the over and over told stories of the wave-particle duality and Schroedinger’s Cat…

May be there are hundreds of books that do this. But I tell you a different and deeply story so relation to the paralel universe that contain from ancient Upanishads to modern String theory and beyond with simply forming “Four Equations” and “Four Stories” in simple “Four Steps”.."

"She is both dead and alive according to some left brains. But I want to give you...

"Physics is all around us. It is in the electric light you turn on in the morning; the car you drive to work; your wristwatch, cell phone, CD player, radio, and that big plasma TV set you got for Christmas. It makes the stars shine every night and the sun shine every day, and it makes a baseball soar into the stands for a home run.

Physics is the science of matter, energy, space, and time. It explains ordinary matter as combinations of a dozen fundamental particles (quarks and leptons), inter...

In these days of numerous text-books the author who dares still further to increase the number owes to the public, at least, an explanation in which he shall set forth his purpose, however far short of accomplishment he may have fallen.

Accordingly, in this volume, the author's hopes have been: –

(i) To prepare a text-book adapted to the needs of first-year students in physics at Northwestern University. One fear in this connection is that the transfer of a course of lectures from flexible...