1.  Refraction

2. How do you make light bend?  When light rays enter a new medium they change in speed, causing them to bend or change direction.

3. What is refraction?  The bending of light as it enters a new medium  Examples:  Air to water  Water to air  Water to glass  What is a medium?  A material through which a wave (light) travels

4. Refraction can cause you…..  To see something that may not actually be there.  That is called an Image.

5. Refraction Animation

6. Figure 8…  Read the first paragraph on page 188 out loud.

7. What is the index of refraction?  How much a ray of light bends when it enters a new medium. Liquids Carbonated Beverages 1.34 - 1.356 Cranberry Juice (25%) 1.351 Honey 1.484 Ice 1.309 Oil, vegetable (50° C) 1.47 Shampoo 1.362 Water (0° C) 1.33346 Water (100° C) 1.31766 Water (20° C) 1.33283

8. Online Example  http://www.snoweria.com/flash/angle_of_refractio n.html http://www.snoweria.com/flash/angle_of_refractio n.html

9. What is white light?  All the colors on the visible spectrum R O Y G B I V

10. Can it be separated?  You Bet!!!  Use a prism to separate light into it’s various wavelengths.

11. THINK: How does a rainbow occur?  White light from the sun enters a rain drop  The rain drop acts as a prism causing the white light to separate.  Displaying the visible spectrum.