Noun
a column of light (as from a beacon)
Source: WordNetArt flies around truth, but with the definite intention of not getting burnt. Its capacity lies in finding in the dark void a place where the beam of light can be intensely caught, without this having been perceptible before. Franz Kafka
A beam of light takes about two million years to reach from us to the Andromeda nebula. But my thought covers this distance in a few seconds. Perhaps some day some intermediate form of body and mind may permit us to say that we actually can travel faster than light. Ragnar Frisch
Regardless of the prophetic value of Dirac's description [on interference] his was probably the first discussion... including a coherent beam of light. In other words, Dirac wrote the first chapter in laser optics. F. J. Duarte
A beam of light was directed first on one mirror and then on the other, and the opposite deflections observed with mirror and scale. Source: Internet
A detailed discussion of the interferometer and its use for determining the speed of light can be found in citation A coherent beam of light (e.g. from a laser ), with a known frequency (f), is split to follow two paths and then recombined. Source: Internet
Alexander Graham Bell used the light-sensitive property of selenium to transmit sound over a beam of light in 1880. Source: Internet