From the foreword by Dr. rer. pol. Erik Kolek The light quantum hypothesis leads to new assumptions about the radiation of black bodies. The principle of relativity has a connection with the constancy of the speed of light. Energy is not directly dependent on mass. Energy-rich mass points have inertia and gravity. The deflection of the light rays is related to their speed c and the gravitational constant k as well as the mass M of the body past which the light passes. The local time l depends on the mass M and the speed of light c in a space-time domain.