Photon as a black hole

The photon has zero rest mass, spin value of h and the constant velocity of c . An upper limit imposed on the energy of the photon is derived using these three unique characteristics and extending the concept of Schwarzschild radius to the photon. The Schwarzschild radius for the photon turns out to be the Planck length and the energy of the photon at this radius is the Planck energy. At this maximum energy, the photon behaves as a black hole. Further, the possible phase change that occurs to the photon at the Schwarzschild radius, from energy to matter as a result of vacuum fluctuations is indicated. Finally, with in the present theory, Planck length and Planck time are shown to be the meaningful minimum values of space and time.