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Why is the sea blue from far away?

Ocean's Light Dance
Why is the sea blue from far away?
Stand on a beach and look out at the ocean. ~~Why does all that water look so beautifully, impossibly blue?~~ After all,

Stand on a beach and look out at the ocean. Why does all that water look so beautifully, impossibly blue? After all, if you scoop up a glass of seawater, it's perfectly clear. So where does the blue come from?

The secret lives in sunlight itself. White sunlight isn't actually white — it's a hidden rainbow, a mixture of every color traveling together. Red light, orange, yellow, green, blue, violet, all racing from the sun at once.

How was this book?