Re: Whats the shape of rainbow if rain drops were a cube?

If raindrops were cubic, then the minor differences in angle of scattering of 
different colors of light, which is significant in making a rainbow visible, 
would be lost in the much wider range of scattering angles for light scattering 
off cubic raindrops.  The following websites provide text and graphic 
descriptions of the physics of rainbows, from which it should be apparent the 
magic of the rainbow is only possible because raindrops are spheric.

I found the following web references by searching for

   +physics +rainbow

   The physics of a rainbow
   http://www.phy.ntnu.edu.tw/java/Rainbow/rainbow.html
[Note that in this reference, the scattering paths which indicate 
characteristic percentages of light travelling that path would not be as 
characteristic for a cubic raindrop because of the random orientations of the 
cubic raindrop relative to the angle of incidence of light.]

   More on rainbow physics
   http://www.webnexus.com/users/billv/rainbow/

   A rainbow physics applet
   http://users.erols.com/renau/rainbow.html

Thanks for your question.

sid