Quote (card_sultan @ Feb 7 2017 02:10pm)
first of all thats not really a rainbow - its like a retarded refrected spectrum - still not enough dispersion to create a rainbow
secondly - a few drops of water ≠ a block of ice , they have different refraction and dispersion indexes as well as different densities - all you did was make water almost like a prism
but nice try at moving the goalposts again, typical dishonesty
How is it not a rainbow? It's a multi-colored band from red to blue in the shape of a bow. What criteria does it not fulfill?
Liquid and solid water actually have almost identical density and refractive index. Both are very slightly lower for ice, while both are quite a bit higher for glass. So liquid water is actually closer to glass than ice is, meaning it's actually easier to make a rainbow with liquid water than with ice.
Also, there's no such thing as "dispersion index" in the context of optics.
And yes, I did make water almost like a prism. Guess what? That's what happens in nature! Raindrops almost act like tiny little prisms.