
Originally Posted by
AntonioLao 2 years ago I was prescribed Ziac to reduce blood cholesterol. But after I lose 35 lbs, my blood pressure becomes too low, I'm off Ziac. Now my diet consists of low fat meat, low carb and salad or as much seafood as I can afford and also bottled water.
Millikan, the famous experimentalist, did his monumental oil-drop experiment to measure the unit electric charge by assuming that the force of gravity is zero such that
[math]F_E=F_B[/math]
in the symmetrical frame of the laboratory, this vector equation became just a scalar equation.
This scalar equation should apply to a photon, since a photon is not affected by gravity because its rest mass at low energy-low speed-weak gravity domain is practically zero. Inside a black hole (very strong gravity field), photon acquired mass due to its energy content as required by the mass-energy equivalence and Einstein field equations of general relativity.