Speed of light is WRONG

Wake up! Don't take all for granted that you are presented with-'question authority'

A) Check your English dictionary. Some have typed in the numerical 'speed of light' with a huge error!! Dictionaries are supposed to be a source of 'authority' everyone should rely upon?

B) The speed of light is not always precisely the same or constant as we are led to believe. The printed data of measurement by "The American Handbook of Physics", 1969 by Mc Graw Hill shows the results  of the recorded speeds from 1945-1960. They are not  identical. There are variations of the speed of light: 299,750-299,792.456 kilometers per second, and definitively not

300.000 kilometers per second.