question_answer

An EM wave radiates outwards from a dipole antenna, with \[{{E}_{0}}\] as the amplitude of its electric field vector. The electric field \[{{E}_{0}}\] which transports significant energy from the source falls off as [r = distance from dipole antenna]

A) \[\frac{1}{{{r}^{3}}}\]

B) \[\frac{1}{{{r}^{2}}}\]

C) \[\frac{1}{r}\]

D) remains constant