Optics

1		What is the most commonly used lens shape and what is the purpose of using it?
2		Why do most middle-aged people need glasses?
3		How does an optical microscope use lenses to make things look larger?
4		How does a digital camera make an electronic image?

The Rainbow

5		What are the positions of you, the sun, falling rain, and the rainbow whenever you see a rainbow?
6		Use a sketch to show how refraction, reflection, then a second refraction of sunlight in a raindrop produces a rainbow.
7		Explain why a fainter, secondary rainbow is sometimes observed and this secondary rainbow has its colors reversed.

Lasers

8		Why is the light from a laser so much more intense than light from ordinary sources?
9		What are some examples of current technologies which make use of lasers?

The Compact Disc

10		How are music, images, movies, and computer data recorded on a compact disc?
11		How is the data on a compact disc read by a CD player?
12		Compare and contrast the advantages and disadvantages of optical compact disc use with the use of magnetic hard disks.

Fiber Optics

13		What is a fiber optic system?
14		How does a fiber optic system send and receive information?
15		What are the advantages and disadvantages of using a fiber optics system?