Abstract:
In this work the energy gap of rabbit and caw were obtained by using
ultraviolet spectrometer, the energy gap for rabbit was found to be 4.22 ev while
that of the caw is 5.3 ev. These band gaps mean that they are semi conductors with
wide band gap.
However the electrical techniques shows that the conductivity of rabbit starts to
increase considerably above voltage of about 20 μv , while that of the cow is
about 15 μv . This discrepancy can be resolved by bearing in mind that the ultra
violet ray cannot easily excite impurities which contribute to conductivity
considerably, while the electric can excite them to produce large amounts of free
electrons .