(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the condition for the radiation term in the expression for the field B to predominate? Express you answer as a relationship between distance r and wavelength [itex]\lambda[/itex].

B(r)=[itex]\frac{\mu_{0}I_{0}\delta l}{4\pi}[/itex]sinθ ([itex]\frac{-i\omega}{rc}[/itex]+[itex]\frac{1}{r^{2}}[/itex])exp[i(kr-[itex]\omega[/itex]t)][itex]\phi[/itex]-hat

3. The attempt at a solution

r>>[itex]\lambda[/itex]?

But how was this result obtained? If r>>c/omega, r>>c/(2[itex]\pi[/itex]f), r>>[itex]\lambda[/itex]/(2[itex]\pi[/itex]), then how was the 2[itex]\pi[/itex] got rid of?

If r>>c/[itex]\omega[/itex], why is this the case?

Please help.

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# What is the condition for the radiation term in the expression for the field B to

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