万物运行的奥秘要点

1、Brownian motionMichelson interferometer Postulations （假设）（假设） of EinsteinvLaws of physics are the same in every inertial frame (惯性坐标系) Perform experiment on train going east gives same results as on train going west.vSpeed of light is c in every inertial frame Measure c=3x108 m/s if you are on train

2、 going east or on train going west, even if light source isnt on the train.Time Dilation （膨胀）（膨胀）At RestMovingvThe light of flash reaches all the sides at the same time?vTwins decide that one will travel to Alpha Centauri and back, while the other stays on earth. Compare their ages when they meet on

3、 earth.Relativistic MomentumvChange in momentum goes to infinite with particles speed approaching to cvC is the limiting speed of particleMass and EnergyvWhat the Mass-Energy relation tells us? Transformation between Mass and Energy!222021/cvcmmcEn静系中静系中 子的平均寿命为子的平均寿命为 =2.2 10-6秒。据报秒。据报导，在一组高能物理实验中，

4、当它的速度为导，在一组高能物理实验中，当它的速度为v=0.9966c时通过的平均距离为时通过的平均距离为8km。按经典力学按经典力学)m(660102 . 210368vL按相对论力学按相对论力学mtvLcvt38626221089 .26103) s (109 .269966. 01102 . 21生命在于运动！生命在于运动！一个电子被电压为一个电子被电压为106V的电场加速后，其质量为多少？的电场加速后，其质量为多少？速率为多大？速率为多大？按经典力学按经典力学! ! !/1093. 52101 . 92) J (106 . 110106 .smvsovvmEeU

5、EekkcsmcvvcvmmkgmcEmcmmcEeUEkkk94. 0)/(1082. 2)(11)(1069. 2101 . 9)103(106 . 1) J (106 . 110106 . 182220303128130220213619按相对论力学按相对论力学Black Hole (黑洞)= C t=11.4km/dayV=1.4107m/hr, -7S/day (Special Relativity)H=2 107m ，about 0.25Fground, +45 S/day, (General Relativity ) Total t=+38 S/dayC= 3105km/SQuestion: The distance between China and U