Droitwich, Tuesday evening. Just before sunset we had a very bright double
rainbow. Immediately below the ROYGBIV (top-bottom) part of the main inner
rainbow was a repetition of the ROYGBIV, although fainter and compressed,
and within that, yet another ROYGBIV sequence, yet fainter still. Any
thoughts as to why there were these two fainter innder rainbows?

Chris

On Wed, 6 Jul 2005 10:48:40 +0100, "Chris Kidd" wrote:

Droitwich, Tuesday evening. Just before sunset we had a very bright double
rainbow. Immediately below the ROYGBIV (top-bottom) part of the main inner
rainbow was a repetition of the ROYGBIV, although fainter and compressed,
and within that, yet another ROYGBIV sequence, yet fainter still. Any
thoughts as to why there were these two fainter innder rainbows?

Supernumerary rainbows, due to interference.

Useless fact no 1. Did you know that the inside of the rainbow is a magnified
image of the sun, hence the reason it is brighter than the outside. I read it
on Wikipedia so it must be correct ;-)

Martin


Chris





Imagine there's no countries
It isn't hard to do
Nothing to kill or die for
And no religion too

John Lennon - "Imagine"