special relativity

E32548

Special relativity is Einstein’s theory of space and time that explains how measurements of distance, duration, and simultaneity depend on the relative motion of observers moving at constant velocities.


Statements (51)
Predicate Object
instanceOf physical theory
theory of relativity
theory of space and time
alsoKnownAs special theory of relativity
appliesTo electromagnetism
high-velocity phenomena
inertial reference frames
assumes constancy of the speed of light in vacuum
principle of relativity
consistentWith Maxwell’s equations
contradicts Newtonian absolute space
Newtonian absolute time
defines spacetime interval
definesLorentzFactorAs γ = 1 / sqrt(1 - v^2/c^2)
eliminates need for luminiferous aether
formulatedBy Albert Einstein
generalizedBy general relativity
hasKeyEquation E = mc^2
E^2 = (pc)^2 + (mc^2)^2
t' = \gamma (t - vx/c^2)
x' = \gamma (x - vt)
implies Lorentz invariance
length contraction
mass–energy equivalence
relativity of simultaneity
time dilation
upper limit on signal speed
velocity addition formula
influenced modern particle physics
quantum field theory
involves Lorentz factor
predicts moving objects contract along direction of motion
muon lifetime dilation in Earth’s atmosphere
relativistic Doppler effect
relativistic kinetic energy
relativistic momentum increase with speed
simultaneity is frame-dependent
time runs slower for moving clocks
twin paradox scenario
publicationYear 1905
replaces Galilean transformations
states laws of physics are the same in all inertial frames
speed of light in vacuum is the same for all inertial observers
symbolForLorentzFactor γ
testedBy atomic clock experiments
particle accelerator experiments
treats space and time as a unified spacetime
usedIn GPS time corrections
uses Lorentz transformations
Minkowski spacetime
validWhen gravitational fields are negligible


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