Preferred Label : quartz–iodine lamp;
IUPAC definition : Wolfram (tungsten) filament high-intensity incandescent lamp containing iodine in
a quartz envelope. Used primarily as a source of visible radiation.;
Scope note : halogens other than iodine may be used in these lamps.; in halogen lamps, the quartz envelope is closer to the filament than the glass used
in conventional light bulbs. heating the filament to a high temperature causes the
tungsten (wolfram) atoms to evaporate and combine with the halogen gas. these heavier
molecules are then deposited back on the filament surface. this recycling process
increases the life of the tungsten (wolfram) filament and enables the lamp to produce
more light per unit of input energy. consequently, halogen lamps are used in a variety
of applications, including automobile headlights.;
Origin ID : Q04994;
See also
Wolfram (tungsten) filament high-intensity incandescent lamp containing iodine in
a quartz envelope. Used primarily as a source of visible radiation.
