light beam
Definition
Noun: A concentrated, directional ray or column of visible light energy. It is a stream of photons traveling in a straight line, often produced by a source like a lamp, laser, or beacon.
Usage
A "light beam" is used to describe a clearly defined, narrow shaft of light. It is often visible when light passes through a medium like fog, smoke, or dust, or when it originates from a focused source. - The lighthouse sent a powerful light beam across the dark sea to guide ships. - The scientist adjusted the laser to produce a precise, thin light beam for the experiment. - Through the dusty attic window, a single light beam illuminated the floating particles.
Advanced Usage
- Technical/Scientific Context: In physics and engineering, a "light beam" often refers to a collimated beam, where light rays are nearly parallel, minimizing divergence. It is fundamental in optics, telecommunications (fiber optics), and medical applications.
- The fiber optic cable transmits data via pulses of light beam.
Variants and Related Words
- Beam of light: A synonymous phrase.
- A beam of light from the projector cut through the darkness.
- Laser beam: A specific, highly coherent and monochromatic type of light beam.
- Searchlight beam: A powerful, sweeping light beam used for illumination or signaling.
Synonyms
- Ray of light
- Shaft of light
- Light ray
Related Phrases
- Pencil beam: An extremely narrow and focused light beam.
- To beam (verb): To emit or shine light brightly in a particular direction.
- The sun beamed through the clouds.
Noun
-
a column of light (as from a beacon)
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