Steve Ross <steveross.effigy@virgin.net> writes: > With the use of a pola you can see a > rainbow in water fountains? Is it the light > reflected off the water spray? A 'pola'? Sounds like a German car, or a sort of mint. You mean a polarising filter? Of course you can see a rainbow in a fountain (with the sun at the appropriate angle), for the same reason you see a rainbow in the sky. The light is refracted by the raindrops, which is why the different colours come out at different angles; reflection would treat them all the same, and make white light. > When you use a pola shooting at height (from an > aircraft) you can see strong colours on the ocean > below... Through an ordinary plane window? Are you sure this isn't to do with the stresses in the plastic window? Good book: Minnaert, M: "The nature of Light & Colour in the open air" Review at http://imaginatorium.org/books/photech.htm#minnaert Brian Chandler ---------------- geo://Sano.Japan.Planet_3 Jigsaw puzzles from Japan at: http://imaginatorium.org/shop/
