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_refraction.h

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.