from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a column of light (as from a beacon)
Sorry, no etymologies found.
Einstein loved gedanken experiments; his most famous was imagining as a boy that he was riding alongside a light beam traveling at the speed of light.
The light beam swung towards the tomb, and when Pichot spoke his voice faltered and he could not quite control a rising pitch.
Pointing the light beam directly at it, Dortmunder saw it was a speaker cabinet from some old sound system, not looted because somebody at one time had kicked it in the mouth, ripping the black-and-silver front cloth and puncturing the speaker’s diaphragm.
She had augmented the light beam with enough visible-frequency rays to allow the user to see where the beam was being directed.
Designed to measure precisely the distance between the Moon and Earth, the LRRR device consisted of a series of corner-cube reflectors, essentially a special mirror that reflected an incoming light beam back in the direction it came—in this case from a laser aimed at the Sea of Tranquility from inside a large telescope at the University of California’s Lick Observatory, east of San Jose.
It was possible for a light beam to cut at least partially through the sludge and drifting guck and pervasive brownness of the water to show the slimy gravel and rusty track over which they were passing, the furry tree stumps on both sides.