Tag Info

New answers tagged

2

Boltzmann's version of entropy require a finite number of states, and Planck had asserted that probability has no meaning without a “finite number of equally likely configurations.”{1} That is, in order to be able to use Boltzmann's equation and obtain finite results, he needed to use a discrete number of states, but light was supposed to be continuous. ...


2

Richard Fitzpatrick's free e-book A Modern Almagest: An Updated Version of Ptolemy’s Model of the Solar System presents a modernized version of Ptolemy's Almagest. (I mention it here.)


3

The problem I think you are having is that once you assume a false statement, you can prove anything. So everything you said in the second paragraph is true if you treat the problem classically. You are right that each electromagnetic standing-wave mode in the cavity would have no energy, and so there would be no electromagnetic energy at all even at finite ...


2

The Rayleigh-Jeans distribution for the black-body radiation (based on the classical equipartition of energy) diverges as the frequency increases. This happens because the energy degrees of freedom asumed continuus lead to this kind of distrribution function. The classical equipartition assignes to every degree of freedom an average energy equal to ...


3

The first law was discovered by Galileo, you can find more details at this link Aristotle interpreted the everyday-life experience of his time, which is absolutely valid also today: if we want to keep motion we must sustain it . "He thought that a body was in its natural state when it was at rest, and for the body to move in a straight line at a constant ...


26

You can check this yourself using this very long link which will give you a list of Hawking's work that has been published in refereed journals, ordered by the number of times they have been cited in other papers (a measure of how influential they are on other scientists). This is a way of providing at least some non-opinion based answer to this question. ...


26

The two largest contributions that come to mind are both in the realm of general relativity. The first is his contribution to the singularity theorems. These are purely general relativistic results (i.e. no quantum mechanics involved), and they mathematically prove that generically one expects to find singularities in spacetime. That is, except in somewhat ...


4

Introduction I restored the original title to show how interesting it is that a non-British student (18 at the time) can be more informed than a British physics graduate. He posted this comment: *"The question before this must be whether it was his original or something like his 1st law, which was a restatement of the experimental findings of ...



Top 50 recent answers are included