ScienceForDummies: 22-29 Sep:

 Hello! After a week of people putting in ideas, the one chosen was about a rainbow. Let's explain what it is and how it forms.

Before we can talk about rainbows, we need to talk about a few properties of the movement of light: Reflection and Refraction. I'm sure you know what light reflection is: when light bounces off something and changes direction.

Refraction is a bit more obscure than reflection. It is the bending of light when it hits a "medium", which includes air, water, and glass, which, slows it down when it hits a substance with a high refractive index. Rainbows are formed from refraction and reflection. 

When light meets aa droplet of water, the light is refracted and separates into seven colors. The rainbow occurs when the light is reflected in the droplet of water and refracted out again into the air. 'Cause it needs both water and light, it usually occurs when the weather conditions are sunny yet rainy.

Thank you for reading!

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