- #1
logearav
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we all know the cosmic rays comes from outer surface of the Earth from higher altitudes and enter the Earth's atmosphere in all directions. but experimental studies have revealed that intensity of cosmic rays increases with altitude and reaches a maximum at about 20 km above Earth surface and above that altitude , the intensity decreases. cosmic rays, being high energetic, comes from outer surface but its intensity is less at higher altitudes above 20 km. what is the reason for this?