The speed of light in vacuum c is the same for all forces including light and all other electromagnetic waves, e.g. ultraviolet, infrared, radio and TV, and may be also the gravity. It is the upper limit speed for the forces in the physical universe and it can't be reached by any matter due to the infinite energy needed. Therefore, to describe this highest speed on the astronomical basis, the distance covered by which in a day as the shortest astronomical time is best compared to the astronomical distance The speed of light in vacuum c is the same for all forces including light and all other and all other including light e l e c t ro m a g n e t i c waves,. . . . . . . waves,. . . . . . . e.g. ultraviolet, infrared, e.g. ultraviolet, infrared, radio and TV, and may be also the gravity. It is the upper lkimit speed for the forces in the physical universe and it can't be reached by any m a t t e r d u e t o t h e i n f i n i t e e n e r g y n e e d e d . e.g. ultraviolet, infrared, radio and TV, and may be also the gravity. It is the upper lkimit speed for the forces in the physical universe and it can't be reached by any m a t t e r d u e t o t h e i n f i n i t e e n e r g y n e e d e d . Speed of light e.g. ultraviolet, infrared, radio and TV, and may be also the gravity. It is the upper lkimit speed for the forces in the physical universe and it can't be reached by any 6 Speed of light IN MONOTHESIM BOOKS, WHY? 7 Speed of light IN MONOTHESIM BOOKS, WHY? Speed of light IN MONOTHESIM BOOKS, WHY?