Optical applications typically employ ___________________ glass?
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Answer: C. Lead
Explanation
Lead glass contains significant concentrations of lead oxide that impart high density and refractive index. These optical characteristics make lead glass the standard material for precision lenses and prisms. Optical applications require the high light dispersion properties characteristic of lead crystal glasses. Glass is an amorphous solid produced by fusing silica with fluxes and stabilizers at high temperatures. Modifying glass chemical compositions alters mechanical strength, thermal shock resistance, and optical properties. Lead glass is traditionally referred to as flint glass in optical and scientific instrument manufacturing.
High-end cameras, microscopes, and telescopes rely on lead glass elements to focus and bend light accurately. Precision optics manufacturing requires optical glass free from internal striae, bubbles, and strain. Specialized glass formulations enable advanced scientific instrumentation used in modern research laboratories. Soda-lime glass is inexpensive and used for bottles and window panes rather than precision optics. Fibre glass consists of fine glass filaments used for thermal insulation and composite reinforcement. Borosilicate glass is designed for low thermal expansion in laboratory glassware and cookware.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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