Which one of the following types of glasses is used for making optical instruments?  - Study24x7
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Nisha Tanwar
09 Aug 2019 10:54 AM study24x7 study24x7

Which one of the following types of glasses is used for making optical instruments? 

A

 Pyrex glass 

B

Soft glass 

C

 Hard glass 

D

 Flint glass

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