___________________ glass is used for the manufacture of optical glass ?
Correct answer: C. Flint
- A. Pyrex
- B. Soda
- C. Flint
- D. Crooke's
Explanation
Flint glass has a high refractive index and good optical properties, making it suitable for optical glass and lenses. Pyrex is valued mainly for thermal resistance, whereas soda glass is ordinary container glass.
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