Rectifier wrote:
You say the "idea was postulated in 1915." Since when does a postulate
become proof making something a law?

It was postulated by Einstein in 1915 and measurements
agreed in 1919. It is said to have been proven a scientific
fact in 1959. I'm just surprised that your university didn't
teach it in the postulate stage, valid measurement stage, or
in the scientific fact stage. :-)
--
73, Cecil http://www.w5dxp.com