Sir Isaac Newton discovered that white light (sunlight) is made up of many colours.
When the Sun shines and it rains at the same time, we see a rainbow.
This is because the raindrops act like tiny prisms: they separate the white light into the seven colours of the rainbow.
We say that prisms disperse white light into all colours.
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| Dispersion of light. Photo from universetoday.com |
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