What is the index of refraction for a crown glass lens?

The index of refraction for crown glass is typically around 1.523. This value indicates how much light is bent, or refracted, when it passes from air into the glass. The index of refraction is a crucial property in optics, as it affects how lenses converge or diverge light. Crown glass is commonly used in lenses due to its good optical properties, including clarity and low dispersion, making it ideal for applications in eyewear and optical instruments. The specific value of 1.523 is important for lens design, as it helps in calculating focal lengths and ensuring that the lenses meet the desired performance standards in various optical systems.