light speed
Photon's travel rate
Light speed is the speed at which light travels in a vacuum—approximately 186,000 miles or 300,000 kilometers per second.
In physics, it represents the fastest possible speed for matter or information.
Figuratively, light speed means extremely fast: Technology is advancing at light speed.
Also written as two words or hyphenated.
Faster-than-light travel medium
- warp driveHypothetical superluminal propulsion system
- starshipFictional interstellar vessel
- interstellarBetween celestial bodies
- wormholeHypothetical spacetime tunnel
jump drive · hyperdrive · Enterprise · Millennium Falcon · FTL · subspace · impulse · parsec
How observers differ
- EinsteinByword for genius
- photonsDiscrete packets of radiance
- vacuumAbsence of matter
- invarianceQuality of staying unchanged
time dilation · electromagnetism · special relativity · causality · constant
Rapid lid movement
- flashBrief burst of light
- instantBriefest unit of time
- split-secondFraction of a moment
- nanosecondOne-billionth second unit
microsecond · millisecond · heartbeat · moment · jiffy · twinkling · eyeblink · fleeting
Merged dimensional framework
- event horizonBlack hole's edge
- singularityPoint where values explode
- galaxyGravitationally bound stellar mass
- quasarLuminous active galactic core
redshift · observable universe · expansion · Big Bang · Andromeda · astronomical unit
hyperspace
Faster-than-light travel medium
- warp driveHypothetical superluminal propulsion system
- starshipFictional interstellar vessel
- interstellarBetween celestial bodies
wormhole · jump drive · hyperdrive · Enterprise · Millennium Falcon · FTL · subspace · impulse · parsec · warp factor
relativity
How observers differ
invariance · time dilation · electromagnetism · special relativity · causality · constant
blink
Rapid lid movement
- flashBrief burst of light
- instantBriefest unit of time
- split-secondFraction of a moment
nanosecond · microsecond · millisecond · heartbeat · moment · jiffy · twinkling · eyeblink · fleeting · rapid
spacetime
Merged dimensional framework
- event horizonBlack hole's edge
- singularityPoint where values explode
- galaxyGravitationally bound stellar mass
quasar · redshift · observable universe · expansion · Big Bang · Andromeda · astronomical unit
- speedsterminal velocity, escape velocity, orbital velocity, supersonic, subsonic
- velocitiesvelocity, terminal velocity, escape velocity, initial velocity, constant velocity
- light physicsphoton, refraction, diffraction, wavelength, polarization
- physicsphysics, momentum, atom, acceleration, gravity
- speedquickness, rate, velocity, pace, swiftness
- space termsmoon, star, planet, rocket, satellite
light speedstandstill
Total cessation of movement
rest · motionlessness · stasis · immobility · dead stop