Lab 3: Properties of Lenses and Telescopes

Lenses

The shape of a convex (converging) lens looks like:

The shape of a concave (diverging) lens looks like:

An image would be called ________ if it can be formed on a screen.
If it cannot be formed on a screen, we say it's a ________ ________.

The focal length of a lens ________ ________.

The steps to making a ray diagram are:
 1)

 2)

 3)

Telescopes

  There are 2 main types of telescopes: ________ and ________.

  A ________ use lenses, while a ________ uses mirrors.