Why does water look blue?

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Sophie Seifert-Gram

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Why does water look blue?
« on: 12/11/2009 10:30:02 »
Sophie Seifert-Gram  asked the Naked Scientists:

I love your show!

I was just about to take a bath and decided to send you an e-mail.

Why does water look green when it is hot, and blue or clear when it is cold?


Sophie Seifert-Gram, 15 years old

Chicago, Illinois, USA

What do you think?


Offline lightarrow

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Why does water look blue?
« Reply #1 on: 12/11/2009 19:19:14 »
Because it absorbs the complementary colour: red-orange.
See also the thread: