Why the Ancient Greeks Couldn't See blue Colour | FactStar

Blue Colour of Sky

Iodine gives blue colour with

We observe blue colour if:

Protein gives blue colour with

Improve the bracketed part of the sentence. I couldn't help but (had to cry) at his sad story.

On electroysing CuSO_(4) solution in presence of Pt , the solution becomes colourless, blue colour of solution disappears. Why?