Rainbows appear when sunlight shines through water droplets suspended in the atmosphere. It is also the order that colors appear in a rainbow! This is the order of the wavelengths of visible light starting with red (the longest) and ending with violet (the shortest). The colors of the visible light spectrum are often referred to as ROYGBIV, which stands for: red, orange, yellow, green, blue, indigo and violet.
#Colors of the rainbow full
Similar to how we hear different sounds depending on their wavelengths, we see different light wavelengths as a spectrum of colors from red to blue, which is how we can pick a yellow jelly bean out of bowl full of different-colored candies. Visible light travels in the form of a wave, much like sound and ocean waves do. In addition to being beautiful, rainbows serve as a wonderful example of visible light’s dispersion and its wavelength spectrum. If you don’t want to wait that long, you can count the colors in the mini rainbow you create yourself in this activity! With it, we can explore the physics of light that creates these beautiful “rainy arches.”
So next time you see a rainbow in the sky try to count how many distinct colors you see! we generally count seven colors in a rainbow whereas elsewhere in the world people only count five? We all see the same rainbows but it can be tricky to count the colors because they all blend together so seamlessly.
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