The rainbow coloring comes from the fact that different areas of the gasoline layer have different thicknesses, and each area reflects a different band of the white light spectrum (ROYGBIV!).

Rainbow Popcorn, or as my 8-year-old calls it ... Use 3 cups of popped popcorn with 2 cups of light green candy melts, 3 cups of popped popcorn with 2 cups of pink candy melts, and 3 cups of ...

Some of the light is reflected back off the inner surface of the raindrop. So when the sun is behind you and the rain in front of you, you see a rainbow of colours reflected back from inside the ...

Rainbows were spotted in parts San Diego on Sunday, with some capturing the colors on camera — but why were they visible in ...