MCQ Detailed View

Different types of glass are manufactured for specific purposes by altering their chemical composition. The ability of a glass to block or cut ultraviolet (UV) rays depends on the materials added during its production. Among the options given, Crookes glass is specially designed to absorb harmful ultraviolet radiation.

Crookes glass contains certain metal oxides, such as cerium oxide, that filter out UV rays. It was first developed by Sir William Crookes to protect the eyes of scientists and workers from the harmful effects of intense UV and infrared light. Because of this property, Crookes glass has been used in eyeglasses, goggles, and protective lenses for people working with bright light sources or in environments where UV exposure is high.

Other types of glass in the options have different properties:

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  Jena Glass: A type of heat-resistant glass developed in Germany, mainly used in laboratory apparatus and optical instruments. It does not specifically block UV rays.

  
  


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  Soda Glass: The most common glass used for windows and bottles. It is made from sodium carbonate and silica but offers very little UV protection.

  
  


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  Pyrex Glass: A borosilicate glass resistant to high temperatures, often used in kitchenware and lab beakers. While durable, it does not effectively filter ultraviolet rays.

  
  

Crookes glass stands out because of its ability to selectively absorb ultraviolet wavelengths while allowing visible light to pass through. This makes it valuable for safety applications, such as protective eyewear for glassblowers, welders, and lab workers exposed to strong light sources.Understanding the properties of different types of glass is important in chemistry and material science, as it shows how chemical additives can change a material’s behavior. This MCQ highlights the special role of Crookes glass in protecting living organisms from harmful UV radiation.