Physicists Discussions (22)

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God said, “div D = ρ, div B = 0, curl E = - ðB/ðt, curl H = J + ðD/ðt,” and there was light.

God said, “div D = ρ, div B = 0, curl E = - ðB/ðt, curl H = J + ðD/ðt,” and there was light. This ingenious statement by atheist-physicist…

Started by Dr. Terence Meaden

27 Jan 17, 2016
Reply by Dr. Terence Meaden

Schrodinger's cat has been caught on quantum film

(Image: Gabriela Barreto Lemos) Schrödinger's cat  has been immortalised in a portrait created by one of quantum theory's strangest conseq…

Started by Dr. Terence Meaden

0 Aug 29, 2014

Cycles of Time by Roger Penrose

Penrose puts forth an old idea, that the end of our universe is the start of a new one, in a beautiful new way.  That is, eventually the un…

Started by Luara

0 Dec 7, 2012

Time dilation at the event horizon of a black hole

As one falls into a black hole a person, or object, would experience a greater and greater time dilation caused by the gravitational field.…

Started by Mark Stanbrook

4 Sep 2, 2012
Reply by Vidur Kapur

String theory, background-independence, and supersymmetry

Is string theory background-dependent? If so, doesn't it contradict relativity and tell us something's not right with string theory? Also,…

Started by Valles Marineris

5 Apr 3, 2012
Reply by Jessica Berman

So what happened before the big bang?

Is this a silly question or one that physics shouldn't ask? Is the universe just one of an infinite multiverse . Has there been big bangs f…

Started by mrmister

10 Feb 19, 2012
Reply by thewoodenwand

Probably lazy of me to ask here - but what happens to matter/energy at absolute zero?

Warning: non-physicist in need of instruction asking a question out of deep ignorance that, very likely, has a simple answer. It seems to…

Started by Howard S. Dunn

11 Feb 19, 2012
Reply by thewoodenwand

Our best hope for a cheap and safe vacation in Space as well as the future of humanity. Do you know of anything else that can match its po…

Started by Cane Kostovski

1 Feb 19, 2012
Reply by thewoodenwand

My little bottle of photons

Here is a question my kid asked (13), I thought it was a good one. Can we capture photons in a bottle and release them at a later time? W…

Started by Mister Harvey

15 Feb 19, 2012
Reply by thewoodenwand

Physics enthusiast asks a question of any physicist.

A month ago or so, an idea popped into my head. Here it is in a nutshell: If you send a space device or ship in an orbit that takes it to d…

Started by Cane Kostovski

13 Feb 19, 2012
Reply by thewoodenwand




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