Radio frequency region of electromagnetic spectrum spreads from few Kilohertz to few thousand Mega Hertz .
The geometry of the Human body allows the limbs, head and torso to act as 3-dimensional antennas. The resulting effect can be called antenna factor. It amplifies the signal as high as five times the signal one may receive with other type of antennas like monopole, dipole and the like.
We can see this effect in any radio frequency receiving instrument, such as, oscilloscope in any electronic lab or more commonly a transistor radio.
If one grabs the tip of antenna or touches the body of any transistor, the signal received multiplies several-fold and the reception improves.
Courtesy : The Hindu
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