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Physics
John Duffield's user avatar
John Duffield's user avatar
John Duffield's user avatar
John Duffield
  • Member for 9 years, 7 months
  • Last seen more than a week ago
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About

I'm an IT guy with a deep interest in physics. I've done a lot of research, particularly into historical papers. See my physics detective website for examples.

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244
What exactly is a photon?
Aug 7, 2016
102
Does a gun exert enough gravity on the bullet it fired to stop it?
Sep 11, 2015
35
Is there any hard scientific evidence that the alpha particle is tetrahedral?
Feb 4, 2017
34
Where is the evidence that the electron is pointlike?
Sep 1, 2016
34
Do black holes violate the first law of thermodynamics?
Sep 3, 2015
27
What is time, does it flow, and if so what defines its direction?
Feb 24, 2016
20
How can length contraction result in electron circular motion in a magnetic field?
Oct 3, 2015
12
Can we find actual rest mass of things on Earth
Jun 21, 2015
10
How does gamma-gamma pair production really work?
Aug 14, 2016
10
Is time an illusion?
Apr 17, 2015
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A canonical relativistic rocket question?
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179
Is quantum computing just pie in the sky?
85
Does the Milky Way move through space?
12
Is there a better explanation of Hawking radiation?
11
Is there a maximum size for a black hole?
9
So where are these measurements of galaxies moving faster than light?