(adsbygoogle = window.adsbygoogle || []).push({}); are complex numbers part of the "real" world

The square root of -1 is used a lot in physics.

But how does it relate to what,I suspect,most people would regard

as the real world i.e real numbers (for example we speak of real

probabilities

and not imaginary probabilities - real probabilities are the "real"

world).

Complex numbers can be represented by two orthogonal axes on a sheet

of paper and so can real numbers.Since such representations are both

geometrical

entities,do complex numbers only relate to real numbers (and hence the

"real" world) in the context of geometry? And since general relativity

is a theory based on ideas of geometry, do complex numbers only relate

to the real

world in the context of general relativity i.e would an imaginary

probability seem reasonable in the theory of general relativity?

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# Are complex numbers part of the real world

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