Wednesday, August 10, 2011

Why Does Rainbow Have Only Seven Colours?

Magical of Rainbow

A rainbow is the result of a prism effect. A prism is an object that refract light. If you shine white light into a prism, you will see 7 colours.Rainbow work in much the same way, but instead of glass its colours are produced by rain. The reason why a rainbow appears circular is because that light is bent across the sky (remember, earth is round).~^^

Painting a Rainbow





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