McqMate
Q. |
Which one of the following is used for sun glasses? |
A. | Pyrex glass |
B. | Flint glass |
C. | Crooks glass |
D. | Crystal glass |
Answer» C. Crooks glass | |
Explanation: A type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation is used in sunglasses. Sunglasses or sun glasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are coloured, polarized or darkened. |
View all MCQs in
PhysicsNo comments yet