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May
15
awarded  Nice Question
May
2
comment What transformation is the metric of general relativity invariant under?
@Siva Tullio Levi-Civita does both in his original book. I get the feeling that physicists skimmed over it, and just took out the bit defining a tensor as having components transforming in a certain way.
Apr
30
answered Can the equivalence principle be shown to follow from special relativity?
Apr
11
comment Invariance of Lagrange on addition of total time derivative of a function of coordiantes and time
There isn't an absolute path in Galilean mechanics, the paths ARE different in the two frames where $x' = x -Vt$
Apr
1
awarded  Popular Question
Mar
17
asked What experiments compete with BICEP 2, and when are their results expected?
Mar
16
comment Why do both plates of a capacitor have the same charge?
user41086's point is a good one. KCL is concerned about currents at a single node, not at multiple nodes.
Feb
13
comment Does the action and Lagrangian have identical symmetries and conserved quantities?
Welcome aboard. Maybe you could click on "tags" or "unanswered" at the top to answer the difficult questions and get your rep up.
Feb
6
comment What's the interpretation of Feynman's picture proof of Noether's Theorem?
awesome question!
Feb
6
answered What's the interpretation of Feynman's picture proof of Noether's Theorem?
Sep
26
accepted Why does a stationary force affect the conservation of momentum, but not the conservation of energy?
Sep
24
awarded  Popular Question
Sep
24
asked Why does a stationary force affect the conservation of momentum, but not the conservation of energy?
Aug
28
comment Discovery of $E=hf$?
@DImension10AbhimanyuPS probably after the edit was added: "The Plank law was first a fit bridging two experimental asymptotics. But it worked so well for different T and with a unique h that Plank started to "derive" this law and introduced those quanta"
Aug
28
comment If electromagnetic induction generates a potential difference in a loop, where are the “high” and “low” potentials?
What did you use to make the great diagrams?
Aug
26
comment Introduction to string theory
How many hours in total did it take you then?
Aug
26
comment Introduction to string theory
It got five stars on amazon.co.uk so I'm interested in studying from it. With its 700 pages, I guessed it would take me at least a year to read, if I spent two hours every day on it, so I was curious how long it took you.
Aug
26
comment Introduction to string theory
How long did it take you to read Becker, Becker, Schwarz?
Aug
26
comment In the topos-theoretic interpretation of Physics by Isham & Doering what role does intuitionistic logic play?
Even if this question can't be answered here at the moment, it'll inspire a few to perhaps learn more about this fascinating subject.
Aug
25
comment Why are magnetic fields only produced by moving charges?
duplicate of: physics.stackexchange.com/q/51346