1. Light Lesson 2 Key Concepts

2. 1.
Objects are visible to people because their eyes intercept and detect light from the objects and convey this information via nerves to the brain.

3. 2.
Energy can neither be created nor destroyed; it is transformed from one form to another. (Energy Transformation)

4. Luminous: produce own light (Sun)3.
Luminous: produce own light (Sun)

5. Non-luminous: reflect or scatter light (Moon)4.
Non-luminous: reflect or scatter light (Moon)

6. 5.
Energy: the capacity to do work. (Work is done when a force moves an object.)

7. Chemical potential energy: energy found in food or oil6.
Chemical potential energy: energy found in food or oil

8. Kinetic energy: Energy of motion7.
Kinetic energy: Energy of motion

9. Potential Energy: Energy of position8.
Potential Energy: Energy of position

10. Flashlight: chemical potential  electrical  light + heat9.
Flashlight: chemical potential  electrical  light + heat

11. Candle: chemical potential  Kinetic  friction  Light + heat10
Candle: chemical potential  Kinetic  friction  Light + heat

12. 11
Flashlight/Radiometer system: chemical potential  electrical  light  heat  Kinetic energy

13. Light is not stored – it is produced through energy transformations12
Light is not stored – it is produced through energy transformations