Fact 1: Water causes refraction of light.

Fact 2: Rainbows are formed when sunlight is refracted through raindrops.

Given the two facts above, answer the question "How are rainbows formed?" with the following options: 
- photosynthesis
 - Light passing through water
 - Cold air mixing with water
 - Hot air passing through water
 - Evaporation of water
 - focusing a lens
 - photosyntehsis
 - Water passing through light


 

  Light passing through water       