Where is a rainbow?
But, where is a rainbow?
The Sun is over your shoulder, the cloud of raindrops is in front of you, but what is the apparent location of the rainbow?
Is it between the observer and the water droplets, in the same location as the water droplets, or behind the water droplets (from the POV of the observer)?
Or is it at some indefinably infinite location?
I should know this...
(a sketched-out ray diagram would be greatly appreciated)