Hello all, Below I have a few questions regarding calculating the half life of muons. We measured how many muons were recorded at the top of a mountain, then measured how many muons were recorded at the bottom. Using this data, we calculated the half life of moving muons. Thanks for the help! 1. A)Why is the flux of muons different at high and low altitudes? B)When calculating the time needed for a muons to travel from the top of a mountain to the bottom, do we need to account for the time that muons spend traveling from high in the atmosphere to the top of the mountain? 2. Relevant equations None 3. The attempt at a solution A) Less Muons make it lower to the ground because some may decay before they reach the muon detector. Also various things such as a mountain may keep muons from reaching the ground. B)No because this time has the same ration as all of the other muons, and when calculating the half life, we are only using the time it takes for muons to reach from the top, to the bottom of a mountain. Thank you all for the help!