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  • Smart Learning for All

  • Why is the ocean blue?

  • Because ocean water reflects blue color of the sky.

  • You are right, but not completely.

  • The main reason for oceans to be blue is the way water molecules absorb and scatter the colors of sunlight.

  • Sunlight has seven visible colors.

  • They are red, orange, yellow, green, blue, indigo and violet.

  • Yes.

  • I saw them in a rainbow.

  • Now, when sunlight falls on the ocean, it passes deep into the water.

  • Here, red, orange, yellow and green colors of sunlight.

  • Are absorbed more strongly by water molecules.

  • While, blue, indigo and violet colors are not absorbed much.

  • Instead, they are scattered, making the ocean appear blue to us.

  • However, as the blue shades penetrate deeper into the ocean, eventually they also get absorbed.

  • Hence, at greater depths the ocean is completely dark.

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Smart Learning for All

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