How does rainbows relate to physic?

Answer:
Rainbows are related to physics through the lens effect of water drops. Water in the atmosphere acts as a lens and bends sunlight passing through the drops producing the colors of the rainbow. Newton demonstrated this lens effect, demonstrating that "white light" was composed of colored light.
First answer by Yawyaw. Last edit by Yawyaw. Contributor trust: 135 [recommend contributor recommended]. Question popularity: 1 [recommend question].