3. Light waves are made of electric and magnetic fields that transfer energy as they travel through space.

4. Some of the light has a lot of energy and has short wavelengths. Some of these waves are shorter than the diameter of an atom. Other light has less energy and longer wavelengths.

8. Radio dishes are use to capture radio waves from space.

9. The prime purpose of radio is to convey information from one place to another through the intervening media (i.e., air, space, nonconducting materials) without wires

11. Microwaves are next with a wavelength of a few centimeters to 0.1 centimeters.

12. We use microwaves to cook food.

16. Infrared radiations can’t be seen, but can be felt as heat and registers on a thermometer.

17. This is the radiation from the sun that warms us.

18. In restaurants, infrared lights keeps food warm

27. This penetrating radiation can cause harm to living tissue, resulting to biological systems or irreparable damage to cells

36. 1.Radio wave - thousands of kilometers to a few centimeters in length 2.Microwave - few centimeters to 0.1 centimeters. 3.Infrared – 0.1 cm to 700 nanometers 4.Visible Light – 100 to 400 nanometers 5.U-V light – 10 to 300 nanometers 6.X-rays - 100ev to thousands of ev 7.Gamma Rays – thousands of ev to billions of ev