Which glass is used to make spectacles ........

General Science (CHSL) Physics

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Which glass is used to make spectacles?

Crook's glass

Potash glass

Jena glass

Soda glass

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Explanation:

Crown glass: Usually this is a soda-lime-silica glass and it is frequently used in making lenses of eye glasses. Crookes glass: In this glass mainly cerium oxide (CiO2) is present which sharply absorbs the ultraviolet rays from the sunlight so utilised in making lenses of eye glasses.

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