They generate little ultraviolet radiation and do not exhibit sharp spectral peaks. The QTH lamps offered by Oriel Instruments employ a doped tungsten filament within a quartz envelope. They are ...

Dennis Kunkle spotted an interesting light bulb glowing dimly in the basement of the Fire Museum of York County on West Market Street ... filaments. Carbon filaments were replaced with tungsten ...

Light bulbs are living on borrowed time, but why do their timers tend to expire just as you turn on a light, instead of flickering out randomly? Everyone has had the experience of coming home from ...

you have to go a long way these days to find something that still uses a tungsten filament. Strangely enough, this lamp-stabilized LM386 Wien bridge oscillator is one place where an incandescent ...

Professor Fink, 51, claims to be the “originator of the drawn tungsten filament” for lamps.* Another scientist given the kudos is General Electric’s Dr. William David Coolidge, 59.

Instead of the light being emitted by an incandescent spiralised filament of tungsten, it is given out by an actual arc between tungsten electrodes.