Einstein wrote later that his major aim was to find facts that would guarantee as much as possible the existence of atoms of definite size. In the midst of this work, he discovered that according to atomic theory there would have to be an observable movement of suspended microscopic particles...
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18. The fact that the moon, as viewed from Earth, appears almost exactly the same size as the sun during a solar eclipse is a complete coincidence of the cosmos. Solarseven / Getty Images —artb3 The moon just happens to be the exact right size and distance away from us as compared ...