Tell whether the statement is TRUE or FALSE.
T1. Light always travel in a straight line.
12. The light that strikes a thick cardboards bends and find another way to pass through it.
13. Light rays can pass all types of materials.
14. A laser is a narrow but a powerful beam of light capable of traveling long distances.
15. Ught can be reflected If it is directed towards a mirror.
16. Optical fibers are used in communication, medicine and industry.
17. When somebody faces a mirror, his reflection can be seen in a reversed manner.
III. Identify what is described below. Choose the answer from the box.
18. Transfer of heat from one place to another through liquid
19. The travel of heat in solid materials
20. Transfer of heat through empty spaces
21. Materials that doesn't allow heat to pass through
22. The heat we receive from the sun
23. The movement of an object back and forth
24. The bending of light as it travels from one material to another
25. The bounding back of light as it strikes In a smooth surface
Reflection
Convection
Refraction
Conduction
Radiant energy
insulators
Vibration
Radiation​