The image below shows a laser that has been shot into a solid block of transparent plastic from the far left end. Once inside the plastic block, the light is repeatedly reflected off of the sides until it reaches the opposite end, on the right.


Image courtesy of Wikipedia

The picture above demonstrates how
A.
optical fibers transmit light signals in high-speed communications.
B.
satellites communicate with ground controllers from outer space.
C.
solar cells transform light energy into electrical energy.
D.
electricity is transmitted from a solar power plant to residential homes.