The Extensive Air Shower Theory

The Extensive Air Shower (EAS) theory explains how high-energy cosmic rays—from space—collide with Earth's atmosphere, creating a cascade of secondary particles. When a cosmic ray hits a molecule in the atmosphere, it produces new particles, which then collide with other molecules, creating more particles. This chain reaction results in a large "shower" of particles spreading out through the air. Detecting these showers helps scientists study cosmic rays' origins and properties, providing valuable insights into high-energy processes in the universe.