Which among the following glasses is used to make lenses of eyeglass?

Crown glass
Soda glass
Pyrex glass
Quartz glass

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 1 : Crown glass

Crown glass is used to make lenses of eyes glass.
It is produced from alkali-lime silicates containing approximately 10% potassium oxide and is one of the earliest low dispersion glasses.
It was an early type of window glass.
Composition- Potassium Oxide, Barium Oxide and Silica.

Soda glass: It is also called soft glass which is brittle and the cheapest and most commonly existing glasses. This can be broken very conveniently and by the alternation of temperature some cracks appear in such glasses.

Used in making tube light, bottles, equipments of laboratory, daily useable domestic utensils

Pyrex glass: It is also called borosilicate glass. It has some specific characteristics of chemical durability and more thermal inmalleable resistance power.

Used in making laboratory equipments and pharmaceutical containers or vessels.

Quartz glass: This is also called silica glass because it is obtained by melting silica and ultraviolet rays emerge out through it. Thus

It is used in making bulb of ultraviolet lamp, in making container of chemical reagents, laboratories equipments etc.

4 views Answered 2022-09-04 04:29

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