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quantum-electrodynamics
waves
work
field-theory
quantum-mechanics
energy
renormalization
acoustics
special-relativity
energy-conservation
differential-geometry
string-theory
homework-and-exercises
electromagnetism
angular-momentum
quantum-spin
visible-light
material-science
atomic-physics
capacitance
experimental-physics
water
terminology
condensed-matter
reference-frames
special-relativity
Coincidence of spacetime events & Lorentz invariance
special-relativity
spacetime
interactions
lorentz-symmetry
locality
A vertical variation of modern versions of Michelson-Morley
special-relativity
speed-of-light
faster-than-light
aether
escape-velocity
Paradox in special relativity involving capacitor
homework-and-exercises
special-relativity
capacitance
Proof for uniqueness of transformation between relativistic frames
special-relativity
metric-tensor
inertial-frames
coordinate-systems
lorentz-symmetry
Does movement because of expansion of space influence the Lorentz factor?
special-relativity
space-expansion
time-dilation
Finding hypersurface equations in order to find unit normals
homework-and-exercises
special-relativity
Energy conservation violation?
special-relativity
energy-conservation
A weird question on SR
homework-and-exercises
special-relativity
Here's a way to transmit data faster than the speed of light
special-relativity
speed-of-light
faster-than-light
Hypothetical faster than light communication?
special-relativity
faster-than-light
causality
information
What is the precise definition of a 4-vector?
special-relativity
vectors
tensor-calculus
definition
lorentz-symmetry
"Shadows are Lorentz Invariant"
homework-and-exercises
special-relativity
lorentz-symmetry
How to interpret Lorentz transformation and synchronized clocks?
special-relativity
Non-relativistic limit of a particle in the uniform electric field
homework-and-exercises
newtonian-mechanics
electromagnetism
special-relativity
Relativity and how speed affects passage of time
special-relativity
time
speed
galilean-relativity
Different result depending on isolate order of variables Lorentz transformations deduction
special-relativity
lorentz-symmetry
Composition of Lorentz transformations using generators
homework-and-exercises
special-relativity
commutator
Relativistic inelastic collsion
special-relativity
collision
A question about twin frog paradox
special-relativity
How do we prove that the 4-current $j^\mu$ transforms like $x^\mu$ under Lorentz transformation?
electromagnetism
special-relativity
vectors
inertial-frames
lorentz-symmetry
What happens when a photon hits a mirror?
special-relativity
speed-of-light
photons
visible-light
reflection
Light at absolute zero?
thermodynamics
special-relativity
particle-physics
speed-of-light
bose-einstein-condensate
Do photons slow down?
special-relativity
visible-light
photons
speed-of-light
reflection
Calculating Momentum in Particle Physics (Introductory)
homework-and-exercises
special-relativity
particle-physics
momentum
conservation-laws
Relativistic de Broglie wavelength
special-relativity
relativity
wave-particle-duality
wavelength
Can D and H form an 'in materials' version of the electromagnetic tensor?
special-relativity
electromagnetism
showing the Minkowski force in the covariant form
homework-and-exercises
electromagnetism
special-relativity
forces
Trouble calculating Wigner rotation for photon
special-relativity
photons
quantum-electrodynamics
polarization
What is this connection between clocks and the Doppler effect?
special-relativity
doppler-effect
The definition of an Levi-Civita epsilon tensor
homework-and-exercises
special-relativity
tensor-calculus
The fully-relativistic classic solution of 2 electrons starting from rest?
electromagnetism
special-relativity
thought-experiment
Lorentz Transform $\Lambda^\mu{}_\nu$ is not a Tensor
special-relativity
inertial-frames
tensor-calculus
definition
lorentz-symmetry
Energy in the Relativistic COM Frame
special-relativity
energy
kinematics
inertial-frames
A question about a commutation relation
homework-and-exercises
special-relativity
lorentz-symmetry
commutator
lie-algebra
Definition of a tensor
general-relativity
special-relativity
terminology
metric-tensor
tensor-calculus
Extreme confusion with the metric tensors
general-relativity
special-relativity
terminology
metric-tensor
relativity
Is it true that matter and antimatter must have same mass?
quantum-field-theory
special-relativity
particle-physics
mass
antimatter
Matter Antimatt
special-relativity
energy-conservation
mass-energy
antimatter
matter
Twin paradox in empty space
special-relativity
inertial-frames
observers
Connection between contra-/covariant vectors in SR and complex numbers?
special-relativity
metric-tensor
vectors
complex-numbers
wick-rotation
Lorentz contraction and magnetism
electromagnetism
special-relativity
Sphere moving at relativistic velocities
special-relativity
Derivative of proper time w.r.t. time?
special-relativity
spacetime
inertial-frames
coordinate-systems
observers
Why should time dilate for a moving observer? ("moving mirror" thought experiment)
special-relativity
time-dilation
Doubt in Lorentz Transformation
homework-and-exercises
special-relativity
tensor-calculus
notation
covariance
Observer problem in Relativity
special-relativity
inertial-frames
observers
Are clocks subject to time dilation?
special-relativity
Lorentz Invariance of Fermionic Bilinear Covariants
quantum-mechanics
special-relativity
lorentz-symmetry
Can special relativity distort the relative order in which events occur?
special-relativity
spacetime
causality
A fundamental question about tensors and vectors
special-relativity
tensor-calculus
coordinate-systems
notation
covariance
How does Newtonian gravitation conflict with special relativity?
special-relativity
gravity
newtonian-gravity
Minimum speed of a baseball to cause nuclear fusion in air?
special-relativity
speed-of-light
nuclear-physics
A spool in Einstein's theory of special relativity
special-relativity
classical-mechanics
inertial-frames
time-dilation
observers
Lorentz-invariant phase space for 2->2 scattering
quantum-field-theory
special-relativity
kinematics
integration
lorentz-symmetry
In the twin paradox, are some events lost to the observer turning around?
special-relativity
reference-frames
inertial-frames
observers
Is the potential energy of a moving object proportional to its clock rate?
special-relativity
energy
spacetime
mass
potential-energy
Inertia at speed of light
special-relativity
speed-of-light
Deriving Maxwell Equations in their covariant form
homework-and-exercises
electromagnetism
special-relativity
maxwell-equations
covariance
No spatial ordering in 1+1D flat Minkowski spacetime?
special-relativity
reference-frames
inertial-frames
coordinate-systems
lorentz-symmetry
Relativistic velocity addition from time dilation
special-relativity
Is the inertia of light equal to the inertia of mass under $E=mc^2$?
special-relativity
photons
momentum
mass-energy
inertia
How to show that two operators in the forms of vectors commute?
homework-and-exercises
special-relativity
lorentz-symmetry
commutator
lie-algebra
Commutation relations of the generators of the Lorentz group
homework-and-exercises
special-relativity
lorentz-symmetry
commutator
lie-algebra
Are there quantum modifications to the rules of special relativity?
quantum-mechanics
special-relativity
How will the Twin Paradox become, for Time Dilation, if no acceleration was ever involved?
general-relativity
special-relativity
relativity
twin-paradox
The value of $c$ in $E=mc^2$
special-relativity
electromagnetic-radiation
units
mass-energy
physical-constants
How much energy would be required to increase the velocity of an electron from 0 to 0.9c?
homework-and-exercises
special-relativity
energy
velocity
Clarification of proper time and inertial frame of reference
homework-and-exercises
special-relativity
reference-frames
inertial-frames
observers
Twin paradox for an orbiting twin
general-relativity
special-relativity
time-dilation
Does Feynman's derivation of Maxwell's equations have a physical interpretation?
quantum-mechanics
newtonian-mechanics
special-relativity
maxwell-equations
The Ultimate Grand Race: Will the photon cross the alpha particle?
homework-and-exercises
special-relativity
speed-of-light
relative-motion
Why is the time different from the reference from of a moving stick with respect to an observer on earth?
special-relativity
time-dilation
Is a photon always alone?
special-relativity
photons
speed-of-light
relativity
Special Relativity Paradox at low speed
special-relativity
Train clocks in special relativity
special-relativity
lorentz-symmetry
When velocities sum greater than c
special-relativity
Hypothetical frame of reference gedanken experiment
special-relativity
reference-frames
relative-motion
Are there better derivation for space contraction?
special-relativity
Are gravitational time dilation and the time dilation in special relativity independent?
general-relativity
special-relativity
Inverse Lorentz transformations
homework-and-exercises
special-relativity
Einstein's train experiment with clocks
special-relativity
inertial-frames
observers
Lorentz boosting and Energy Scale
quantum-field-theory
special-relativity
Doppler effect equation derivation
special-relativity
doppler-effect
Time is in absolute Motion Or Not?
special-relativity
spacetime
speed-of-light
time
coordinate-systems
Special Relativity, Kinetics - Momentum and velocity
homework-and-exercises
special-relativity
kinematics
approximations
The implications of Einstein's first law
special-relativity
inertial-frames
invariants
Meaning and logic of Einstein's train thought experiment
special-relativity
inertial-frames
observers
thought-experiment
Young and Freedman Proof: No Observer Can Travel at the Speed of Light
special-relativity
visible-light
speed-of-light
inertial-frames
observers
Magnetism And Special Relativity
electromagnetism
special-relativity
magnetic-fields
electric-current
charge
Spaceships connecting with spring (A deeply different version of Bell's spaceship paradox)
special-relativity
forces
spring
Lorentz force and Lorentz contraction on a current carrying wire
electromagnetism
special-relativity
Mass changes by absorbing light energy with Doppler shift
special-relativity
mass-energy
doppler-effect
Is theory of relativity valid for an observer in water?
special-relativity
optics
speed-of-light
inertial-frames
refraction
Seeming paradox of length contraction
special-relativity
Complex angle found in inner product
special-relativity
metric-tensor
vectors
complex-numbers
Does decrease in temperature affect mass $E=mc^2$?
thermodynamics
special-relativity
temperature
mass-energy
Concern about Spacetime Invariance
special-relativity
spacetime
relative-motion
Homework Problem: Travelling to a Distant Star
homework-and-exercises
general-relativity
special-relativity
Measuring time using Spin Precession
quantum-mechanics
special-relativity
time
magnetic-moment
precession
Rocket propelled by a giant monochromatic laser
homework-and-exercises
special-relativity
laser
rocket-science