Question

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.



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

Answer 1

C. Optical fibers transmit light signals in high-speed communications.

Explanation: The repeated internal reflections inside the plastic block demonstrate total internal reflection, which is the principle that guides light down an optical fiber.