PHY100H1 Study Guide - Final Guide: Cn Tower, Mass, Big Bang
92 views3 pages
tiger2929 and 106 others unlocked
10
PHY100H1 Full Course Notes
Verified Note
10 documents
Document Summary
Answer directly from 3rd edition of the textbook: According to the principle of relativity, only un-accelerated observers observe the same laws of physics: suppose you drop a ball while traveling on a train moving at constant speed along a straight track. The ball falls straight downward with an acceleration of 9. 8 m/s2 (usual acceleration due to gravity). Suppose the laser appears green in ryan"s rest frame. Suppose you measured the speed of the laser beam which is approaching you. The laser looks to me also as green. The speed of the laser beam will be 300,000 km/s, the speed of light: suppose you have a twin brother. He should go on a sufficiently long and fast trip, and then return, he will then be younger than me: you and i are standing on the top deck of the cn tower. We synchronize our iphones, which are each equipped with super-accurate internal atomic clocks.