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Color Absorption Filament (OP-F-CA)

Color Absorption Filament (OP-F-CA)

Demonstrates that colored filters transmit their own color but absorb other colors of light.


1.  Bulb with 3 colored filters around it
2.  Diffraction gratings
3.  Variac

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  • Description

    Product Description


    1.  Turn on the bulb and look at the bright white strips of light  through a grating.
    2.  There are 3 darker strips interspersed between the bright ones.  Comparing the first darker strip (red filter) with a bright one, you should see only red part of the spectrum, blue and green are missing.  The next dark strip ( blue filter) will show only blue, missing red and green parts, and likewise for the green.