Focal Lengths of Lenses

Using chalkboard diagrams, the focal lengths of diverging and converging lenses are briefly described. Next three parallel beams of light from the blackboard optics system are projected across the chalkboard in a partially darkened room. The beams are first refracted through a diverging lens, then through a converging lens, and finally through a combination of two adjacent converging lenses. The refracted beams are observed and the focal lengths are noted in each case.
Equipment:
- Blackboard optics light source
- Power supply
- Connecting wires
- Various blackboard optics lenses
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This video is part of the project "Videos of Physics Demonstrations", which is created by Dr. Galli and Dr. Amiri of Physics Department, Weber State University. To access the full library of the videos, please visit this link: www.weber.edu/...
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