Linear Polarized Filters

Demo Number 221
Location Shelf 40
Description 6H10-Place two filters on top of one another then rotate the screens. When the screens are at 90 degrees to each other, no light will pass through. 6H20-Look at a reflective surface like the floor through the filter and rotate. you will notice the reflection gets dimmer. 6H30- Place two filters on top of one another such that there is no light passing through. Now inset a third in between these filters. Notice how light now passes through.
 Related Demos 229
  • There are dozens of polarizing filters in the box.
  • Use an overhead projector to show the entire class.

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