Question : Lens is made up of:
Option 1: Pyrex glass
Option 2: Flint glass
Option 3: Ordinary glass
Option 4: Cobalt glass
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Correct Answer: Flint glass
Solution : The correct option is Flint glass.
There are several materials that can be used to make lenses, and flint glass is one of the most widely utilized types of glass in lens manufacturing. Since flint glass has a relatively high refractive index compared to other forms of glass, it can bend light more easily. For specific optical applications, this feature makes it valuable.
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Question : Heat resistant variety of Glass is ____.
Option 2: Haed glass
Option 3: Flint glass
Option 4: None of these
Question : Which type of glass is used for making glass reinforced plastic ?
Option 3: Quartz glass
Option 4: Fibre glass
Question : The core of the Earth is made up of___________.
Option 1: cobalt and nickel
Option 2: iron and cobalt
Option 3: nickel and magnesium
Option 4: nickel and iron
Question : Persons suffering from myopia are advised to use
Option 1: Convex lens
Option 2: Concave lens
Option 3: Plano-convex lens
Option 4: Plano-concave lens
Question : What is ordinary law?
Option 1: Law made by the high court
Option 2: Laws made by the supreme Court
Option 3: Laws mde and enforced by the government
Option 4: laws made by the common people
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