Interior Reissner-Nordstrom black holes

It is shown that a scalar wave packet localized at the event horizon, and considered as a small disturbance is able to send waves that after a double scattering sneak into the Cauchy horizon producing unbounded energy densities there. It is shown that this is a direct consequence of the analytic structure of the reflection and transmission coefficients. It is concluded that the inner horizon is generally unstable in nature. The tunneling into a different equivalent universe is an artifact of this model. In the Reissner-Nordstrom case the inclusion of the observed universal microwave radiation is sufficient to produce a great change of the R-N topology at the Cauchy horizon. In dealing with the dynamics of the massless scalar waves in this geometry it is discovered that the radial part of the equatons arising by perturbations of a family of black holes (Schwarzschild, Reissner-Nordstrom and Kerr) is a form of the spin-weighted spheroidal wave equation. In other words, the angular part and the radial part of scalar perturbations of the black holes mentioned above obey the same equation