Which glass is used for making lenses and prisms?
AHard glass
BFlint glass
CSoda glass
DBorosilicate glass
Answer:
B. Flint glass
Read Explanation:
Flint glass is known for its high refractive index and high dispersion, making it the ideal choice for manufacturing high-quality lenses, prisms, and other optical instruments.
Hard glass (usually containing calcium and potassium) and Soda glass (the common, low-cost glass for windows and bottles) are not suitable for precision optics due to their lower quality and optical properties.
Borosilicate glass (like Pyrex) is known for its excellent resistance to thermal shock, making it ideal for laboratory glassware and cookware, but not typically the primary choice for precision optics.