This document describes an experiment to test after-images and complementary colors. Participants are instructed to stare at colored shapes for 30 seconds each and then describe the color of the after-image seen, comparing results with others. The experiment aims to see if there is a pattern to the complementary colors seen in after-images for different hues.
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Pb human colour_perception
1. Seeing in colour
Stare at the coloured dot in the middle of
the next picture for a minute.
Then describe what you see when you
look at the next slide.
5. Colours
Look at the next slide and make sure you
know the usual names of these six
colours.
7. Colours
Look at the next slide for a minute
staring directly at the cross in the middle.
Describe what you see when you look at
the following slide.
11. After-images and complementary
colours
Look at each of the following shapes for
about 30 seconds.
Describe the colour of the after-image you
see.
Compare what you see with what other
people in the class see.
Is there a pattern in the results? Note that
some people may see things differently, or
describe them differently.