Many applications of silicate glasses derive from their optical transparency, which gives rise to one of silicate glasses' primary uses as window panes. Glass will transmit, reflect and refract light; these qualities can be enhanced by cutting and polishing to make optical lenses, prisms, fine glassware, and optical fibers for high speed data transmission by light. Glass can be colored by adding metallic salts, and can also be painted and printed with vitreous enamels. These qualities have led to the extensive use of glass in the manufacture of art objects and in particular, stained glass windows. Although brittle, silicate glass is extremely durable, and many examples of glass fragments exist from early glass-making cultures. Because glass can be formed or molded into any shape, and also because it is a sterile product, it has been traditionally used for vessels: bowls, vases, bottles, jars and drinking glasses. In its most solid forms it has also been used for paperweights, marbles, and beads. When extruded as glass fiber and matted as glass wool in a way to trap air, it becomes a thermal insulating material, and when these glass fibers are embedded into an organic polymer plastic, they are a key structural reinforcement part of the composite material fiberglass. Some objects historically were so commonly made of silicate glass that they are simply called by the name of the material, such as drinking glasses and reading glasses. QUESTIONS:

Q1:
1. How does glass get its color?
2. What imparts a hue to glass?
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Q2:
1. What kind of enamel can be used on glass?
2. What sort of enamel is compatible with glass?
3. 
Q3:
1. How does glass affect light?
2. What is the interaction between glass and light?
3. 
Q4:
1. How can one enhance glass's interaction with light?
2. What can you do to make glass interact better with light?
3. 
Q5:
1. Can glass be cut and polished to make glasses lenses?
2. Are lenses of glasses made by cutting and polishing glass?
3. 
Q6:
1. What sort of transparency do glasses have?
2. What is the nature of glasses' transparency?
3. 
Q7:
1. What is glass mostly used for?
2. What is the primary function of glass?
3. 
Q8:
1. What kind of art can be made from glass?
2. What sort of art uses glass?
3. 
Q9:
1. Why is glass so common for things like bowls?
2. Why do objects like bowls use glass so frequently?
3. 
Q10:
1. Does silicate glass break easily?
2. Does it take very little for silicate glass to shatter?
3. 
Q11:
1. Can silicate glass last a long time?
2. Is silicate glass quite long lasting?
3. 
Q12:
1. What does glass become when extruded?
2. What is the name for extruded glass?
3. 
Q13:
1. Is thermal insulating material made out of fibers?
2. Do fibers make up thermal insulating material?
3. 
Q14:
1. Does thermal insulating material release air when matted down?
2. Does compacting thermal insulating material release air?
3. 
Q15:
1. What happens when glass is extruded and matted as glass wool?
2. What is the result of matting glass wool?
3. 
