Rainbows.

Rainbows can only appear when it is sunny and raining at the same time. This one went right across our garden. The colours of a rainbow are Red, Orange, Yellow, Green, Blue, Indigo and Violet. You can remember the colours with the mnemonic “Richard Of York Gave Battle In Vain”.

Notice how the inside of the rainbow is always lighter than the outside. You can find out more about rainbows and other light effects at this web site:

http://www.atoptics.co.uk/bows.htm