Light Energy

4. objects allow some light to travel through them.
6. a colored material that is completely or nearly insoluble in water.
7. When the electrical current makes contact with the base of the bulb, electricity enters and heats the tungsten filament housed inside.
8. Luminescence is the spontaneous emission of light by a substance not resulting from heat; or "cold light".
10. the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.
11. a transmissive optical device that focuses or disperses a light beam by means of refraction.
12. Light absorption is the process in which light is absorbed and converted into energy.
14. light amplification by the stimulated emission of radiation
15. a representation of an object produced by means of radiation usually with a lens or mirror system.

1. eflection of light-rays off smooth conducting surfaces, such as polished metal or metal-coated glass mirrors The angle of reflection is equal to the angle of incidence.
2. a change in the direction of motion of a particle because of a collision with another particle.
3. the act or process of sending electrical signals to a radio, television, computer, etc.
5. A convex lens is thicker at the center than at the edges. Rays of light that pass through the lens are brought closer together.
9. Light absorption is the process in which light is absorbed and converted into energy.
13. the property of transmitting light without appreciable scattering so that bodies lying beyond are seen clearly.