Multiple choice

What is the gas present in fluorescent lamps?

  1. Sodium vapour

  2. Neon

  3. Mercury vapour

  4. Tungsten vapour
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fluorescent lamps contain a small amount of mercury vapor. When electricity is passed through the lamp, the mercury atoms emit ultraviolet light, which is then converted to visible light by the phosphor coating.

Keep practicing — related questions