Newton's second law
is motion equation in classic mechanics that
does not say anything about the nature of force.
The equivalent formulations and their extensions
such as Lagrangian and Hamiltonian do not
explain about mechanism of converting Potential
energy to Kinetic energy and Vice versa. In
quantum mechanics, Schrodinger equation is
similar to Newton's second law in classic
mechanics. Quantum mechanics is also extension
of Newtonian mechanics to atomic and subatomic
scales and relativistic mechanics is extension
of Newtonian mechanics to high velocities near
to velocity of light too. Schrodinger equation
is not a relativistic equation, because it is
not invariant under Lorentz transformations.
Dirac expanded The Schrodinger equation by
presenting Dirac Sea and founded relativistic
quantum mechanics. In this paper by
reconsidering the Dirac Sea and his equation,
the structure of photon is investigated and it
is made an attempt to answer these following
1- What is the
relation between photon and its electromagnetic
2- Does force have
physical existence or it is just a mathematical
tool to describe physical interactions?
3- What is the
mechanism of converting potential energy to
kinetic energy and vice versa?
4-What is the
relation between gravity and electromagnetics?
5-What is the
relation between Weyl fermions and Dirac