electromagnetic poynting vector confusion
hi,
when we derive the expression for poynting vector, we write E.(derivative of E) = [(derivative of) (E*E)] /2.
I want to ask from where does this factor 2 come.
in the above case the derivative of E is taken with respect to time and the '.' signifies the dot product being taken.
when we derive the expression for poynting vector, we write E.(derivative of E) = [(derivative of) (E*E)] /2.
I want to ask from where does this factor 2 come.
in the above case the derivative of E is taken with respect to time and the '.' signifies the dot product being taken.
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