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An EM wave radiates outwards from a dipole antenna, with E_{0} as the amplitude of its electric field vector. The electric field E0 which transports significant energy from the source falls off as

a.    \frac{1}{r^{3}}

b.    \frac{1}{r}

c.    \frac{1}{r^{2}}

d.    remains constant


Answers (1)

A diode antenna radiates the electromagnetic waves outwards. The amplitude of electric field vector  falls intensity inversely as the distance (r) from the antenna

The answer is the option (b) 1/r

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