3,031 reputation
1317
bio website physics-quest.com
location Netherlands
age 95
visits member for 4 years, 4 months
seen 1 hour ago

Aug
23
revised Is the spin 1/2 rotation matrix taken to be counterclockwise?
added 43 characters in body
Aug
23
answered Is the spin 1/2 rotation matrix taken to be counterclockwise?
Aug
21
answered How do simple two-component Fierz identities follow from a property of the Pauli matrices?
Aug
20
revised Why does the Dirac equation require matrices to be rotationally invariant?
added 219 characters in body
Aug
20
revised Why does the Dirac equation require matrices to be rotationally invariant?
added 12 characters in body
Aug
20
revised Why does the Dirac equation require matrices to be rotationally invariant?
added 8 characters in body
Aug
20
answered Why does the Dirac equation require matrices to be rotationally invariant?
Aug
10
revised Massless boson in 2D and its (retarded) propagator
deleted 1 character in body
Aug
10
answered Massless boson in 2D and its (retarded) propagator
Aug
8
awarded  Necromancer
Jul
1
awarded  Enlightened
Jul
1
awarded  Nice Answer
May
2
awarded  Good Answer
Apr
19
awarded  Yearling
Sep
30
awarded  Explainer
Aug
5
comment What is the physical meaning of the action in Lagrangian mechanics?
@Nathaniel: It holds for non-inertial particles, yes, since we can derive the equation-of-motion from the Lagrangian. You can find images similar to the one above for particles subject to the Lorentz force here: physics-quest.org/Book_Lorentz_force_from_Klein_Gordon.pdf (A chapter of my book)
Aug
5
comment What are the mechanics by which Time Dilation and Length Contraction occur?
Hi, Ruslan. I have updated the answer with the example of the static field of a point charge moving with a constant velocity $v$.
Aug
5
revised What are the mechanics by which Time Dilation and Length Contraction occur?
added 229 characters in body
Apr
19
awarded  Yearling
Dec
20
awarded  Nice Answer