An extended light bundle is size limited by using apartures to a small light bundle to explain the meaning of a light beam. Furthermore, it is shown that a light beam travels linear.
- minimal preparation time
- light-intense halogen lamp
- easy teaching by using the demo board for demonstration
- ideal complement to analog student experiments by directly comparable devices
Limit the light bundle spatialy so that the bundle becomes a single light beam. Observe the resulting light beam.