PHY100H5 Lecture Notes - Lecture 10: Time Travel, Tangled, Mass In Special Relativity
Document Summary
What happens when objects move at a speed that is comparable to the speed of light? (cid:1005)9(cid:1004)(cid:1004): ne(cid:449)to(cid:374)"s (cid:373)e(cid:272)ha(cid:374)i(cid:272)s, ther(cid:373)od(cid:455)(cid:374)a(cid:373)i(cid:272)s a(cid:374)d ele(cid:272)tro(cid:373)ag(cid:374)etis(cid:373) (cid:449)ere complete and permanent (they were considered absolute truth that explained everything regarding physics) 1905: albert einstein, a patent clerk form switzerland, challenges the concepts of space, time, mass and energy that are at the basis of newtonian physics. There is nothing consistent in time, space, and mass. The only thing that remains constant is the speed of light. Whenever these people move with different speeds, we say there is relative motion between them. Question: a train moves 70 m/s to the right. Velma throws a ball toward the front of the train at 20 m/s (as measured on the train). The ball and train are both moving in the same direction, so, relative to mort the two speeds add together (and he sees it as 90 m/s)
