Light+and+Matter

=Unit 2 Optics=

Chapter 5 Optical systems make use of mirrors and lenses
5.1 The Ray Model of Light


 * Light and Matter Interacting**

What you see when you look around - objects, colours, shapes, textures, etc. - all depends on how much light is in a room and the type of matter in an object (as that determines the amount of light an object abosrbs, reflects, and transmits). There are three different types of materials that light is transmitted into or through an object: transparent objects, translucent objects, and opaque objects. Transparent objects such as glass and water are made of materials that absorb light but still let the light rays pass through in a straight line. Materials where most of the light rays pass through them but are scattered in different directions are called translucent objects - frosted glass or a lampshade. Opaque objects are made of materials where no light passes through them. For example - a desk or a door.


 * 5.1 Light and matter** page 169


 * **Questions** || **Answers** ||
 * What is transparent? Give definition. || Allows light to pass though freely, objects can be seen clearly. Absorbs or reflects small amount of light. ||
 * What is translucent? Give definition. || Allows some light to pass through but are scattered in all directions. Resulting not seeing the object clearly. ||
 * What is opaque? Give deffinition. || Allows no light to pass through, absorbs and reflects all the light. ||
 * What materials are transparent? List 2. || window glass, wine glass ||
 * What materials are opaque? List 2. || clay flower pot, wooden door ||
 * Why does matter interact with light? || To recognize different objects, and to determine how much light a type of matter absorbs, reflects and transmits. ||
 * What are the 3 ways Matter can interact with light? || Matter can absorb, reflect and transmit light. ||
 * What materials are opaque? List 2. || clay flower pot, wooden door ||
 * Why does matter interact with light? || To recognize different objects, and to determine how much light a type of matter absorbs, reflects and transmits. ||
 * What are the 3 ways Matter can interact with light? || Matter can absorb, reflect and transmit light. ||
 * Why does matter interact with light? || To recognize different objects, and to determine how much light a type of matter absorbs, reflects and transmits. ||
 * What are the 3 ways Matter can interact with light? || Matter can absorb, reflect and transmit light. ||
 * What are the 3 ways Matter can interact with light? || Matter can absorb, reflect and transmit light. ||

http://bouman.chem.georgetown.edu/S02/lect10/lect10.htm

http://en.wikipedia.org/wiki/QED

http://www.astronomy.ohio-state.edu/~pogge/Ast162/Intro/spectra.html