Question

Which one of the following types of glass can cut off ultraviolet rays?
a. Soda Glass
b. Pyrex Glass
c. Jena Glass
d. Crookes Glass

Answer 1

crooked glass is a special kind of glass which contain cerium oxide and this is able to cutt off ub rays of sun and are thus used to make sunglasses.

Answer 2

Types of glass that can cut off ultraviolet rays are Crookes glass.

Option (d).

Explanation:

• Glass is an inorganic and solid material. It is usually transparent, hard, and brittle in nature.

• Glass is made from raw materials such as sand, soda ash and limestone.

• Crookes glass is a type of glass that contains cerium oxide.

• It has a high absorption of ultraviolet radiation.

• It is used in making lenses of eyeglasses, especially in sunglasses. Ultraviolet rays are electromagnetic radiation that contains wavelengths from 10 nm to 400nm.

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