Which of the following lamp types require the use of phosphors to produce light?
A) Metal halide
B) Sodium vapor
C) Incandescent
D) Fluorescent

Question

Quizplus · Accepted Answer

Only fluorescent lamps require the use of phosphors to produce light. Phosphors are coated on the inside of the lamp tube and produce visible light when excited by the ultraviolet radiation produced by the discharge of the lamp’s mercury vapor. Metal halide and sodium vapor lamps produce light through a discharge of gas and vaporized metal salts. Incandescent lamps produce light through resistance heating of a filament.

Which of the Following Lamp Types Require the Use of Phosphors