The
detector with galena and PN junction
Jagadish Chandra Bose, professor of physics at Presidency College
in Calcutta, India,
patented a device in 1904: Detector for electrical disturbances
Inside the device an EM wave detector was used (detector with cat whiskers).
A galena crystal device that is negatively polarized (N) and a manual
leverage,
having a thin thread of metal in the top part (the whisker) which seeks
the N polarity on the galena crystal.
The polarization of the elements in the galena (p / n) changes the structure,
or conductor or insulator:
The direct polarization produces electromagnetic current into the crystal,
- the crystal is a conductor.
The reverse polarization produces eddy currents into the crystal, -
the crystal is an insulator.
So, the polarization itself, switches the quality of the crystal,
from electric conductor in the electrical insulator and vice versa, by
the polarization sense of the galena.
The effects of electric current
The vectorial current is not an orderly movement of the vectors in
conductor, as "electrons"
The vectorial current are the orthogonal polarities of atoms, serially
connected in the conductor.
So, the electric current in a closed in circuit, is a string of centripetal
vector interactions,
which increases the current density, differentiated on each element of
the circuit.
The centripetal interaction produces the effects of electric current
:
Radiation, force, electrolysis, electrolysis is also the electric arc,
etc.
