What is the process famously dubbed for energy propagation in this dense stellar layer?
Answer
The random walk
The constant cycle of absorption and re-emission that photons undergo as they traverse the radiative zone is specifically termed the random walk. This occurs because the plasma is extremely hot and dense, causing charged particles to immediately interact with and block the path of newly generated photons. Each interaction forces the photon to change direction randomly before being absorbed again by another particle. This repeated, non-linear bouncing is what distinguishes the energy transport in this zone, creating an extremely tortuous path for the energy packet traveling from the core outward.
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