It was used to close a gap and also enlarge the two teeth next to my front teeth. Now i'm hearing all these things about BPA since its found in dental composites and cancer risks etc and I'm scared.Should I get it removed?
Maybe. You need to talk with the city planning department. Another solution would be to put speed bumps on your street. A lot of the streets in my neighborhood have them.
Purely theoretically: if the light source were removed (anything that can generate light could absorb it), the light would bounce around forever. In reality, there is always some absorption, but consider a fiber optic cable a few microns wide and a few kilometers long: it is an exercise for the student to calculate how many reflections occur, and there is a loss of only a few dB in the best materials.
