______ 2. The light that strikes a thick cardboard bends and find another way to pass through it.
______ 3. Light rays could not be blocked, and they could pass through all types of materials
since they traveled on straight lines.
______ 4. A laser is a narrow but powerful beam of light capable of travelling far distances on a
straight line.
______ 5. Optical fibers are used in communication, medicine, and industry.
TRUE or FALSE?