Home PYQs UPPSC UPPSC MCQs Prelims 2021 (GS Paper I)

Question

Which of the following types of glass can cut off ultraviolet rays?

  1. Soda glass
  2. Pyrex glass
  3. Jena glass
  4. Crookes glass

Answer:

Option D: Crookes glass

Detailed Solution:

The correct answer is “Crookes glass”.

Crookes glass is specifically designed to block ultraviolet (UV) rays. It has been used in laboratory equipment, especially in UV-sensitive applications.