Check your understanding Exercise 1. True or false?

1. Images can’t be generated sequentially by point-by-point scanning, they can be produced only simultaneously.

2. To the ancients, the processes of image formation were full of mystery.

3. In the 19^th century scientists discovered that rays of light traveled in straight lines.

4. Today’s concept of an image is more convenient to regard an image as being composed of overlapping patterns of varying frequencies and contrasts.

5. Gauss published his classical book on geometrical optics, in which he expounded the concept of the theory of relativity.