Which of the following lamps contains a poisonous gas and therefore should be disposed safely ?
[amp_mcq option1=”Compact fluorescent lamp” option2=”Light emitting diode” option3=”Neon lamp” option4=”Halogen lamp” correct=”option1″]
This question was previously asked in
UPSC CAPF – 2014
Compact fluorescent lamps (CFLs) contain a poisonous substance, mercury vapor.
Compact fluorescent lamps (CFLs) use mercury vapor within a glass tube. When electricity passes through, it excites the mercury vapor, producing ultraviolet (UV) light, which then excites a fluorescent coating on the inside of the tube, causing it to emit visible light. Mercury is a toxic heavy metal that poses environmental and health risks if released, necessitating safe disposal practices for CFLs.