Jay Holben The next in line on our examination of lighting fixtures is the PAR, which is an acronym for Parabolic Aluminum Reflector. The classic PAR is a reflector and lamp all in one. It is a sealed ...

Borrowing from modern telescope design, researchers have proposed a way to concentrate sunlight to ramp up laser efficiency. Legend tells of Greek engineer and inventor Archimedes using parabolic ...

Researchers have designed a new LED-based train headlight that uses a tenth of the energy required for headlights using conventional light sources. If operated 8 hours every day, the electricity ...

PRIOR to the year 1822, the optical apparatus used in the best equipped lighthouses was silver-plated parabolic reflectors, having apertures, twenty-one inches for fixed, and twenty-five inches for ...

Could you explain how the headlamp is directed, its scatter and the ability or style of light to pierce the dark? I drive on hill-and-dale county roads and have experienced many times "high-beams" ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

A light rigid structure (of aluminum or other material) which reflects sound to a focus at which a MICROPHONE is placed. This focussing effect is very strong with WAVELENGTHs less than the aperture of ...