AST-1A Lecture Notes - Lecture 10: Photon, Black Body, Photosphere
Document Summary
Away from earth, damaging radiation (energetic particles) Sun power comes from nuclear reactions in interior of sun. In the core, the energy is transported by radiation. In the core, a photon can travel about 0. 006 cm before being scattered. This layer of the sun is called the photosphere, and it is the visible surface of the. The photosphere emits a continuous, black body spectrum with a temperature of 5777 k. Convection from small cells of hot rising gas and sinking cooling gas creates a pattern of. Granules last for 10-20 minutes before being replaced by another granule. granulation on the surface. A blackbody is a perfect body that completely absorbs every kind of electromagnetic. Blackbodies radiation and reradiates the energy as quickly as it absorbs it. Charcoal is a decent blackbody in the visible. The sun is a very good blackbody. That is, each square meter on the surface of the black body emits this much energy per second.
