More About This Resource...

• This article, available as a six-page printable PDF file, takes a look at the technology of digital imaging. It discusses the following four concepts in depth, and provides a reading list for further research:

  • digital images are pictures stored as numbers
  • comparing images of the same object at different times reveals motion
  • filters enable a black-and-white camera to distinguish different colors of light
  • computer manipulation can enhance images and reduce distortion

• Completion Time

  Less than 1 period

• Teacher Tip

  Supplement a study of astronomy or technology with an activity drawn from this article.

  1. Ask the class what they know about digital pictures. How are they created? How are they transmitted?
  2. Send students to this online article, or print copies of the essay for them to read.
  3. Have them briefly explain each of the four concepts in their own words.

• Topic

  Astronomy

• Subtopic

  Tools and Methods