Rainbows

[SteveD]

The other evening, following a rainstorm, the clouds moved away leaving a clear sky with the low sun shining brightly. The result was a spectacular, double rainbow.

If similar conditions existed at night, but with a full moon instead of the sun, would a rainbow also appear?

[jake-the-peg]

Here's someone who's claiming to have seen one

http://eo.ucar.edu/rainbows/Mikkelson.html

[Teddio]

Sun showers are much more common than Moon showers. Such a Moon rainbow would be of such low light intensity as to appear monochrome to the naked eye. Long exposures by camera will bring out the colour though.

[monty0703]

There are also 'fogbows' - quite spectacular.

http://www.atoptics.co.uk/droplets/fogbow.htm