Question:
Crown types of glasses are
Crown types of glasses are
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Crown glass is an optical glass used in lenses and prisms, often together with flint glass.
Updated On: May 7, 2026
- Laboratory apparatus grade
- Optical grade
- Sealing type
- Ultraviolet transmitting type
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The Correct Option is B
Solution and Explanation
Crown glass is a type of optical glass.
It is used in optical instruments such as lenses and prisms.
Crown glass generally has relatively low refractive index and low dispersion compared with flint glass.
In optical design, crown glass and flint glass are often combined to reduce chromatic aberration.
Because of its optical clarity and controlled refractive properties, crown glass belongs to optical grade glass.
Laboratory apparatus glass is usually borosilicate type.
Sealing glass is used for joining glass to metals or other glasses.
Ultraviolet transmitting glass is designed for UV transmission.
Therefore, crown types of glasses are:
\[
\text{Optical grade}.
\]
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