Hello. I just have a few questions about random stuff, and I feel that this section of the forums is appropriate to place it. 1. Whats the deal with glass. So all I know about glass is that you melt sand into a liquid, let it cool down to a certain temperature, and it becomes solid glass. What I don't understand is how the glass(sand I guess) becomes transparent. Do the atoms become transparent or something? 2.Do atoms ever stop vibrating? What happens to the motion of atoms at say absoulte zero? 3. Why absolute zero? Is 0 K the coldest temperature attainable or something? 4. How do atoms bond? I can't imagine there being a line between them like O-O So I know they like share electrons or something, but don't electrons follow a path around the nucleus? How would they do that if the electrons are connected? Why do they bond in the first place if they both are negatively charged wouldn't they repel each other or something? 5. Does light have mass? If so how can it go through glass, and stuff like that? Thanks, Ill be back with more questions soon enough.