Apparent Depth

The concept of apparent depth is briefly desribed and light beams from a blackboard optics system together with a block of plastic are used to demonstrate the paths of light that lead to the apparent thickness or depth of the block. Next, in a different demonstration, a transparency and later a coin are placed on the overhead projector and brought into focus on the screen. Then a block of plastic is placed on top of these objects and it is shown how the apparent change in depth or thickness of the block requires raising the lens of the overhead projector for proper focus.
Equipment:
- Blackboard optics light source
- Power supply
- Connecting wires
- Rectangular transparent plastic block
- Overhead projector
- Transparency
- Coin
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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/physics/amiri_g...
Links to University and Department:
Weber State University Homepage: www.weber.edu/
WSU Physics Department: www.weber.edu/physics