The white light emitted by a fluorescent lamp is provided by the
A) filtering effect of the glass tubing.
B) phosphors on the inner surface of the lamp.
C) high temperature of the glowing gas.
D) mercury vapor in the lamp.

Question

Quizplus · Accepted Answer

The white light in a fluorescent lamp is produced by phosphors that coat the inner surface of the tube. These phosphors fluoresce (emit light) when they are excited by ultraviolet light produced by the mercury vapor in the lamp, converting the UV light into visible light.

The White Light Emitted by a Fluorescent Lamp Is Provided