Then check the box:
Here are some colored lines. Which of these will be bright, and which
dark, when viewed through a red color filter? Or a blue filter? Think
about it and predict first, before you try it.
Now look at them through a color filter, or hold the color filter right
against the screen. Did your predictions work?
You could use this to send different messages to people who have a
blue view, or a rosy
outlook! Here's an example
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Copyright 2000 J. P. Straley and S. S. Kovash |