Why is water different colors? (Rain, water in a glass, oceans/lakes)

Question

I understand why the ocean and lakes are blue, water absorbs red light out of the spectrum so it appease “blue” to over simplify. But is water in a glass, or drops of rain, look clear? What’s the difference?

In: 1

Answer 1

Water is very slightly blue, with *heavy* emphasis on the “very slightly” part.

You need an enormous amount of water to see the effect, which is only observable after the sun’s light has passed through water for a long distance and slowly filtered out the reds.

You won’t notice that 0.000000001% of the red light has been filtered out from a raindrop, just like you probably don’t notice the window glass in your home is slightly green.