The additives in Crookes glass, particularly cerium oxide, have the property of strongly absorbing UV light, preventing it from passing through. This type of glass was historically used for making spectacle lenses to protect eyes from UV damage.
Clean, dry air contains volume. volume. volume. D. 81% nitrogen and 11.94% oxygen, by volume. Ans: A Clean, dry atmospheric air has a very stable composition dominated by nitrogen and oxygen. By volume, approximately 78% is Nitrogen (N₂) and 21% is Oxygen (O₂). 86. Which one of the following types of glasses can cut-off ultraviolet rays ?
Asked in GPSC Prelims CSP 2 2023 · HPPSC HPAS Prelims 2013 · Topic: Inorganic Chemistry (Chemistry of Main Group Elements (s-block and p-block))
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