6F10.61 - Dyes - Transmitted and Reflected

See paragraph one in the procedure section.
Code Number:
Demo Title:
Dyes - Transmitted and Reflected
Absorption & Reflection
Area of Study:
Staedtler pens, black construction paper, white writing paper.

Take the different color pens and write onto the white paper.  The red, green, and blue colors should show up as normal.  However, when you write on the black paper with the red pen, it will appear green, the blue pen will appear red, and the green pen will appear blue. 

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.