The field of fiber optics depends upon light rays traveling through tiny optical fibers. The fibers are so small that once the light is introduced into the fiber with an angle within the confines of
the numerical aperture of the fiber, it will continue to reflect almost losslessly off the walls of the
fiber and thus can travel long distances in the fiber. Bundles of such fibers can provide services
suc as high speed internet.
Which wave phenomena best describes how light waves act in fiber optics?