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'''Real numbers''' can be thought of as numbers which can be represented by some infinite or finite decimal representation, such as 0.707106781187...
'''Real numbers''' can be thought of as numbers which can be represented by some infinite or finite decimal representation, such as 0.707106781187...
They are called "real" because they actually exist in the real world, i.e. measures, weights, temperetures and so on are all real numbers. As opposed to the [[imaginary number|imaginary numbers]], which are just an abstract concept, but do not really exist.
In classical physics, measurements of things that can vary smoothly and continuously, like speed or temperature, are treated as real numbers.
In classical physics, measurements of things that can vary smoothly and continuously, like speed or temperature, are treated as real numbers.