Video and lesson investigations on the topic of persistence of vision . Key concepts include:
- Our eyes are fooled if a color card is spun quickly.
- We cannot distinguish the individual colors. What is seen is a combination of all the component colors on the card.
- The primary colors of light are red, green and blue (unlike the primary colors of pigments which are red, yellow and blue).
- Their complements are cyan, magenta and yellow.
- When a color wheel of red, green and blue is spun very rapidly, white light results.
- Spinning combinations of two colors will give a third color that is the combination of those two colors.
- The colors do not actually mix.
- At a certain speed (faster than 12 images a second) the brain cannot see each image, or color, separately.
- Instead they merge together.
- This process is called ‘persistence of vision’.