$(a)$ How does the sky appear from the surface of the moon?
$(b)$ What is the cause of the blue colour of the ocean?
$(b)$ What is the cause of the blue colour of the ocean?
(N/A) The sky appears dark from the surface of the moon because there is no atmosphere to scatter sunlight.
$(b)$ The water molecules of the ocean scatter blue light more strongly than light of other colours due to the phenomenon of scattering. Consequently,the ocean appears bluish.
$(b)$ The water molecules of the ocean scatter blue light more strongly than light of other colours due to the phenomenon of scattering. Consequently,the ocean appears bluish.
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