Respuesta :

Answer:Detailed Solution. Crooks glass mainly comprises of cerium oxide which absorbs the ultraviolet radiations from the sun. This is why crooks glass is used in sunglasses

Explanation:

Answer:

They are made of Crooks glass.

Explanation:

Crooks glass mainly comprises of cerium oxide which absorbs the ultraviolet radiations from the sun. This is why crooks glass is used in sunglasses.