Assertion: laser | /r/HasProperty | light source
Facets:
Source sentences:
text: Laser is an acronym for Light Amplification by Stimulated Emission of Radiation, and is a light source that, unlike a light bulb, produces powerful light that has only one “color” and goes in one direction.
text: Lasers are sources of light with very special properties, as discussed in the article on laser light.