Changes

:<math>E=mc^2</math> ...... (1)

:<math>E=mc^2</math> ...... (1)

where <math>c^2</math> is square of speed of light in vacuum adjusted by <math>(d\tau/dt)</math> (ratio of proper time to coordinate time<ref>This ratio is expressed sometimes as <math>\sqrt{g_{oo}}</math>, where <math>g_{oo}/math> is time-time component of metric of spacetime) which means that <math>c_2 \sqrt{g_{oo}}</math> is not a constant but a function of time and we may take its non vanishing derivative with respect to time.</ref>) and <math>m</math> is rest mass of a particle though the equation works also for ''[[relativistic mass]]'' with just the energy increased by kinetic energy of the particle, it turned out that this mysterious force of alleged ''attraction'' comes just as derivative of the above equation with respect to displacement of the particle <math>dx</math>.  

where <math>c^2</math> is square of speed of light in vacuum adjusted by <math>(d\tau/dt)</math> (ratio of proper time to coordinate time<ref>

 

This ratio is expressed sometimes as <math>\sqrt{g_{oo}}</math>, where <math>g_{oo}</math> is time-time component of metric of spacetime) which means that <math>c_2 \sqrt{g_{oo}}</math> is not a constant but a function of time and we may take its non vanishing derivative with respect to time.</ref>) and <math>m</math> is rest mass of a particle though the equation works also for ''[[relativistic mass]]'' with just the energy increased by kinetic energy of the particle, it turned out that this mysterious force of alleged ''attraction'' comes just as derivative of the above equation with respect to displacement of the particle <math>dx</math>.  

It came from the fact that the time ''slows down in vicinity of any external mass'' just by right amount to cause such force.  

It came from the fact that the time ''slows down in vicinity of any external mass'' just by right amount to cause such force.