1. explain the graph in detail ! 2. why is the cosmic ray flux inversely proportional to the energy (when the energy is large then the cosmic ray flux is small)? 3. where do you get the graphics from?

104 102 10-1 1 particle/m?/second 104 10-7 10-10 Flux (m' sr s GeV)-1 10-15 10-18 Knee 10-14 1 particle/m/year 10-23 10-29 Ankle 10-28 1 particle/km?/year 1010 1015 103 Energy (ev)