Jake Clark, University of Southern Queensland and Nataliea Lowson, University of Southern Queensland
It’s all to do with the light from the Sun and a blanket of air wrapped around Earth called the ‘atmosphere’.
The sea is blue because of the way water absorbs light, the way particles in the water scatter light, and also because some of the blue light from the sky is reflected.
Flickr/Fiona Paton
Photons stream from the sun and interact with all matter on Earth. Depending on what the light touches, some of the photons will get absorbed or soaked up. And some will bounce back.
Our veins only appear blue through the skin, they’re actually red.
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