# Friday math movie: Imaginary Number

By Murray Bourne, 20 Sep 2013

I remember being blown away by the idea of imaginary numbers when I first came across them. How can you possibly use a number that does not exist? How can you square a number and end up with a negative number?

For some background, see Complex Numbers.

This short video (4 min 36 sec) is one of the series Sixty Symbols, videos about the symbols of physics and astronomy from the University of Nottingham.

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