  Second law of thermodynamics is applied to a few electronic processes. It is
seen that the second law of thermodynamics holds good for all except one
mentioned here. The classical approach, based on exact equivalence of emission
and absorption spectra, for electron transition from lower energy level (first
orbit) to higher energy level (second orbit) violates the second law of
thermodynamics. But since second law which implies irreversibility and is
universally true, a new explanation of electron transition from lower to higher
energy level is proposed which leads to better understanding of several topics
such as Fraunhofer lines, Optical laser. Also, interestingly, it is shown that
widely different fields such as second law of thermodynamics and special
relativity are in fact closely linked to each other. Also, possible links
between supersymmetry and new concept of quaternion mass are mentioned.
