Can rainbows appear in random places?
A. Sort of. As explained in one of the above answers, the primary rainbow is some part of an arc 42 degrees around the shadow of you head. But if you call something like a fountain a random place, then on a sunny day you can walk around the fountain until the spray from it lies on this arc, and you will see a rainbow. You can do that for lots of random artificial sources of drops of water in the air, like garden sprinklers, irrigation sprays, and the spray from artificial water falls. To see a secondary rainbow you would use 51 degrees instead of 42. Q. How do you make a rainbow? A. All you need is bright sunshine and lots of water drops. Go outside on a hot summer day with a hose with a nozzle on it which will produce a fine spray of water and spray water in the air in the direction you would expect to see a rainbow. The direction is 42 degrees away from the shadow of your head. 42 degrees is about twice the width of your strached out hand at arms length. So find the shadow of your he
