What to do with lenses - or the optical bench for a period of finacial crises

Abstract

The article describes how it is possible to built very simple and cheap otical bench from plactic cable rays. The light source consisting of high luminostity LEDs enables to do experiments without special darkening of a classroom.

Also principles of Galilo and Kepler telescopes and other experiments can be demonstrated at the bench.

Keywords

• teaching and learning physics
• school experiments
• geometrical optics
• optical bench