The video discusses the Crystal Cathedral in California, known for its 10,000 glass windows. It explains that glass is made from silica sand, sodium carbonate, and calcium carbonate, which undergo a chemical reaction when heated. The properties of glass, such as transparency and moldability, make it suitable for various applications, including architecture. The Crystal Cathedral uses glass to maximize sunlight, reducing the need for electric lighting.

How does the design of the Crystal Cathedral utilize the properties of glass?

What is the significance of the glass allowing sunlight into the Crystal Cathedral?