Solved UPSC CDS/OTA Question
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Q · Mineralsmedium · 45s
Which mineral is known for its fluorescence under ultraviolet light?
TopicMinerals
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Fluorite is famous for its fluorescence under ultraviolet light, exhibiting brilliant colors including blue, green, purple, and yellow. This optical property led to the term "fluorescence" itself. Composed of calcium fluoride (CaF₂), fluorite is used in metallurgy as a flux, in optics for lenses, and as a source of fluorine for various chemical processes including Teflon production.
Final Answer: Option A - Fluorite