I've read that fiber optic cable has an almost nonexistent rate of data loss that is much less than that of cable or DSL.
I also learned in physics that when a ray of light passes through a tube with a bend in it, some of the light will be lost through refraction. This would seem to me to prevent fiber optic cables from being practical, whereas electrical signals traveling through wires don't experience this same phenomena.
What am I not thinking of? Does the insulation on fiber optic cables not allow any light to leave the cable?
I also learned in physics that when a ray of light passes through a tube with a bend in it, some of the light will be lost through refraction. This would seem to me to prevent fiber optic cables from being practical, whereas electrical signals traveling through wires don't experience this same phenomena.
What am I not thinking of? Does the insulation on fiber optic cables not allow any light to leave the cable?