"Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length..."
The concept that objects appear shorter in the direction of motion when measured by an observer in relative motion.
Special relativity: The theory of how space and time are affected by high speeds and strong gravitational fields.
Lorentz transformation: The mathematical formulas that describe the transformation of space and time between two reference frames moving relative to each other.
Time dilation: The phenomenon where time appears to pass slower for objects traveling at high speeds or near strong gravitational fields, as observed by an outside observer.
Speed of light: The constant speed at which light travels in a vacuum, and the maximum speed that any object can travel.
Inertial frames of reference: Reference frames that are not accelerating, where the laws of physics take on their simplest form.
Length contraction: The concept that moving objects appear shorter in length along the direction of motion, as seen by an observer in a different reference frame.
Synchronization of clocks: The need to synchronize clocks in different reference frames in order to measure time intervals accurately.
Relativistic velocity addition: The formula for adding velocities in special relativity, which is different from the formula in classical mechanics.
Twins paradox: The thought experiment where a twin that travels at high speeds for a long period of time appears to age slower than the twin that stays at rest.
Proper time: The time experienced by an observer that is co-moving with an object, as opposed to the time experienced by an observer in a different reference frame.
Relativistic mass: The concept that an object's mass increases with its velocity, according to special relativity.
Energy-mass equivalence: The formula that relates an object's mass and energy, as described by Einstein's famous equation E=mc^2.
Time travel: The possibility of traveling forward or backward in time, as predicted by the implications of special relativity.
Experimentation and observation: The importance of experimental verification and observation in confirming the predictions of special relativity.
"It is also known as Lorentz contraction or Lorentz–FitzGerald contraction..."
"...(after Hendrik Lorentz and George Francis FitzGerald)..."
"...and is usually only noticeable at a substantial fraction of the speed of light."
"Length contraction is only in the direction in which the body is travelling."
"For standard objects, this effect is negligible at everyday speeds..."
"...and can be ignored for all regular purposes..."
"...only becoming significant as the object approaches the speed of light relative to the observer."
"...which is the length as measured in the object's own rest frame."
"It is also known as Lorentz contraction or Lorentz–FitzGerald contraction..."
"(after Hendrik Lorentz and George Francis FitzGerald)..."
"...at a substantial fraction of the speed of light."
"Length contraction is only in the direction in which the body is travelling."
"For standard objects, this effect is negligible at everyday speeds..."
"...only becoming significant as the object approaches the speed of light relative to the observer."
"...object's length is measured to be shorter than its proper length..."
"...and can be ignored for all regular purposes..."
"For standard objects, this effect is negligible at everyday speeds..."
"It is also known as Lorentz contraction or Lorentz–FitzGerald contraction..."
"...only becoming significant as the object approaches the speed of light relative to the observer."