speed of light- the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second light speed,c constant- a number representing a quantity assumed to have a fixed value in a specifie...
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speed of light :Definition, Usages, News and More speed of light nthe speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second ...
The meaning of SPEED OF LIGHT is a fundamental physical constant that is the speed at which electromagnetic radiation propagates in a vacuum and that has a value fixed by international convention of 299,792,458 meters per second —symbol c.
It serves as the single limiting velocity in the universe, being an upper bound to the propagation speed of signals and to the speeds of all material particles. In the famous relativity equation, E = mc2, the speed of light (c) serves as a constant of proportionality, linking the formerly...
light speed noun :thespeed of light Accelerating particles to nearlight speed, such machines are ideal for smashing them to make exotic states of matter, blast out new particles, or even search for new dimensions of space.— Adrian Cho
a. A source of light, especially a lamp, a lantern, or an electric lighting fixture: Turn out the lights when you leave. b. The illumination derived from a source of light: by the light of the moon. c. The particular quantity or quality of such illumination: moved the lamp closer to...
All colors depend on light. Physics. Also calledlu·mi·nous en·er·gy[loo, -m, uh, -n, uh, s , en, -er-jee];.electromagnetic radiationto which the organs of sight react, ranging in wavelength from about 400 to 700 nanometers and propagated at a speed of 186,282 miles per seco...
of a metre) forredlight down to about 400 nm forvioletlight. The spectral regionsadjacentto the visible band are often referred to as light also,infraredat the one end andultravioletat the other. Thespeed of lightin avacuumis a fundamentalphysical constant, the currently accepted value of ...
glanced from the glass windshield. Glint suggests a hard bright gleam of reflected light, as from something polished or burnished: Light glints from silver or from burnished copper. To glitter is to reflect intermittent flashes of light from a hard surface: Ice glitters in the moonlight. ...