Meditation Material for Non-Mathematicians

I was in a meeting at work earlier this week with some math-types and the subject of imaginary numbers came up. It was explained that the square root of negative one is an example of an imaginary number. I understand the concept of "square root", but the square root of a negative number completely evades me.

As the conversation continued I spent a few moments sincerely trying to conceptualize the sqaure root of negative one. Then I turned to my boss and told him that I think I could actually meditate on the square root of negative one because when I think about it my mind goes completely and utterly blank. Sort of like it does when I think about the sound of one hand clapping. Fortunately, my continued employment does not rely on my math skills. Or on my ability to keep my thoughts to myself.