People have been asking questions about rainbows since the beginning of time. One question frequently asked is, how far away is that rainbow? That is a tough one. How far away are the raindrops that produce it? It is hard to judge how far away a rain cloud is; especially if it’s moving. The rainbow’s distance extends from the nearest to the farthest raindrops that contribute any part of the colored light. The closest of these raindrops may be miles away. In the case of water spray from a lawn sprinkler in which a rainbow appears, you can reach right in and “touch it”….or so it seems. Many questions are unique to one’s cultural history. Where is that pot of gold? That is a good question too.