ASTR 1102 Lecture : Lecture27
Document Summary
A clock on a faster moving object will get behind a stationary one. This really happens - it has been tested on airliners. Very small effect since planes are non-relativistic (i. e. they move at much less than the speed of light) One twin boards a spaceship and sets off to see sirius at nearly the speed of light. The twin at home has aged a 20 years, but the one who travels only a few years. Not really a paradox, one twin has been stationary, the other has accelerated and decelerated several times. Muon is unstable - typically decays within 2. 2 microseconds. Problem: muons are produced 100km up in the atmosphere. They take about 33 microseconds to reach the ground. Solution: the muons are move at 99. 9% of the speed of light. To them the journey to the earth takes less than 2 microsec. We know oscillating electrons produce electromagnetic radiation (e. g. radio)
