CD / CD-R / DVD

Read How Stuff Works CD Burners.

Answer the following questions:

1. What are bumps? How do they allow a CD to store information?
2. Why does the disk spin at a varying rate?
3. How does dye replace bumps in CD-R's?
4. Why does a CD burner have two lasers?
5. How do phase change crystals allow CD-RW's to work?

Read How Stuff Works DVD.

Answer the following questions:

1. What are the three different types of DVD's?
2. Explain what Track Pitch is and what Minimum Pit Length is. How do these compare to a CD?
3. How does MPEG-2 format reduce the file size of a movie?

©2006 C. Whittington