Searchlight

A searchlight (or spotlight) is an apparatus that combines an extremely luminous source (traditionally a carbon arc lamp) with a mirrored parabolic reflector to project a powerful beam of light of approximately parallel rays in a particular direction, usually constructed so that it can be swiveled about.

Read more about Searchlight:  Military Use, Non-military Use

Famous quotes containing the word searchlight:

    At night thousands of names and slogans are outlined in neon, and searchlight beams often pierce the sky, perhaps announcing a motion picture premiere, perhaps the opening of a new hamburger stand.
    —For the State of California, U.S. public relief program (1935-1943)

    The press is no substitute for institutions. It is like the beam of a searchlight that moves restlessly about, bringing one episode and then another out of darkness into vision. Men cannot do the work of the world by this light alone. They cannot govern society by episodes, incidents, and eruptions. It is only when they work by a steady light of their own, that the press, when it is turned upon them, reveals a situation intelligible enough for a popular decision.
    Walter Lippmann (1889–1974)