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Top Questions
16
votes
Why does gravity travel at the speed of light?
general-relativity
speed-of-light
gravitational-waves
causality
asked Dec 15 '17 at 17:00
physics.stackexchange.com
9
votes
Gravitational waves frequency
frequency
gravitational-waves
ligo
asked Apr 5 '16 at 9:19
physics.stackexchange.com
8
votes
Special Relativity, refractive index and catching up with a wave
electromagnetism
special-relativity
inertial-frames
refraction
observers
asked May 15 '16 at 14:17
physics.stackexchange.com
6
votes
Lagrangian for a free Dirac field equal zero?
lagrangian-formalism
field-theory
dirac-equation
asked Dec 30 '16 at 21:12
physics.stackexchange.com
5
votes
In-universe reason for Peter Purves having two distinct parts in “The Chase”
doctor-who
character-motivation
asked 7 hours ago
scifi.stackexchange.com
Top Answers
17
Students bringing babies to class
academia.stackexchange.com
12
No students show up to class — what should an instructor do?
academia.stackexchange.com
12
How can the solutions to equations of motion be unique if it seems the same state can be arrived at through different histories?
physics.stackexchange.com
10
Prove that an electron in a hydrogen atom doesn't emit radiation
physics.stackexchange.com
7
An elegant way to solve $\frac {\sqrt3 - 1}{\sin x} + \frac {\sqrt3 + 1}{\cos x} = 4\sqrt2 $
math.stackexchange.com
7
Distance and Speed
physics.stackexchange.com
7
Is the entropy a Lorentz invariant?
physics.stackexchange.com
5
Calculus - finding the difficult limit $\lim_{x \to 0} \frac{1-(\cos x)^{\sin x}}{x^2}$
math.stackexchange.com
5
If the sum to 4 terms of a geometric progression is 15 and the sum to infinity is 16 find the possible values of the common ratio.
math.stackexchange.com
5
The lightest photon ever detected
physics.stackexchange.com
5
Force between the plates of a capacitor
physics.stackexchange.com
5
Dispersion relation for lattice vibrations: Why are there two and not four solutions?
physics.stackexchange.com
5
non-negative energies
physics.stackexchange.com
5
Does a displacement current have to be included in the Biot Savart Law?
physics.stackexchange.com
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