Which one among the following is used in the manufacture of ultra-viol

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Which one among the following is used in the manufacture of ultra-violet protective glasses ?

Aluminium oxide
Tungsten oxide
Molybdenum oxide
Cerium oxide
This question was previously asked in
UPSC CAPF – 2024
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The correct option is D. Cerium oxide is commonly used as an additive in glass manufacturing to absorb ultraviolet radiation, thus producing ultra-violet protective glasses.
– Certain metal oxides, when added to glass, can impart specific optical properties, including the absorption of UV light.
– Cerium oxide (CeO₂) is particularly effective at absorbing UV radiation across the spectrum relevant for protecting eyes and materials from UV damage.
While other oxides can affect glass properties, cerium oxide is specifically known and widely used for its UV absorption capabilities in glasses for spectacles, laboratory ware, and architectural uses.

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