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Pendleton College AS/A2 Physics Forum :: A2 Revision Unit 5 Optional Topics :: Electromagnetic Waves
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Maxwell's Equation
jmorris Thu Apr 19, 2012 9:09 am
Maxwell derived an equation for the speed of electromagnetic waves.
He used it to show that the speed of an electromagnetic wave in a vacuum is the same as the speed of light in free space.
I this way he showed that light is an electromagnetic wave and that infra red and ultraviolet radiations beyond the visible spectrum are also electromagnetic waves.
Later the discovery of Xrays and radio waves confirmed his predictions.
Maxwell's theory demonstrates the power of a theory that predicts observable effects that agree with experimental observations.
In Maxwell's equation epsilon nought is a constant that relates the strength of the electric field in free space to the charge that creates it and mu nought is a constant which relates the magnetic flux density of a magnetic field to the current that creates it.
He used it to show that the speed of an electromagnetic wave in a vacuum is the same as the speed of light in free space.
I this way he showed that light is an electromagnetic wave and that infra red and ultraviolet radiations beyond the visible spectrum are also electromagnetic waves.
Later the discovery of Xrays and radio waves confirmed his predictions.
Maxwell's theory demonstrates the power of a theory that predicts observable effects that agree with experimental observations.
In Maxwell's equation epsilon nought is a constant that relates the strength of the electric field in free space to the charge that creates it and mu nought is a constant which relates the magnetic flux density of a magnetic field to the current that creates it.
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Join date : 2012-01-31
Pendleton College AS/A2 Physics Forum :: A2 Revision Unit 5 Optional Topics :: Electromagnetic Waves
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