Question

Which type of glass is used in making lenses for cameras, telescopes and microscopes?

• A. Optical glass
• B. Colored glass
• C. Processed glass
• D. Silica glass

Answer 1

The correct option is A

Optical glass

Optical glass is a high purity glass used in the production of lenses needed for high precision as in spectacles, telescopes, microscopes, cameras, etc. The major raw materials for these are sand, soda ash, lead oxide and boron.