Write TRUE if the statement is correct. Write FALSE if the statement is wrong., 1. Light always travels on a straight line._______ The light that strikes a thick cardboard bends, and finds another way to pass through it.____, 2. Light rays could not be blocked and they could pass through all types of materials since they, travel on a straight line.________, 3. A laser is a narrow but powerful beam of light capable of travelling far distances on a, straight line._____, 4. Optical fibers are used in communication, medicine and industry.________, 5. Light can be reflected if it is directed towards a mirror._______, 6. Refraction is the bouncing back of light that strikes a clear surface._________, 7. When somebody faces a mirror, his reflection can be seen in reversed manner.________, 8. Light travels faster in air than in liquids._________, 9. The speed of light remains the same even if it travels from one material to another._____, 10. Echo is the term used for the sound that is reflected back to its source._____, 11. Bats and dolphins used echolocation to locate their food and determine their direction.___, 12. Only animals have the ability to use echolocation.———, 13. The sea floor is mapped using echolocation.———-