Muons are created in a process near the top of a mountain 4630m above sea level. the rnean muon traveling at u = 0.99c downward with γ = 7.1 will decay at sea level, what is the mean lifetime when it is at rest?

good for her? ? where is the question?

so easy. just google the electromagnetic waves and it’ll pop up.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this