AST201H1 Lecture Notes - Lecture 7: Photosphere, Electromagnetism

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Bryan Gaensler

Document Summary

In neutral gases, electrons are bound to atoms: plasma- gas that is hot, electrons break free from the atoms. What could sustain that immense of a temperature: e= m x c2, energy mass. Clicker quiz: if a reaction creates energy through e=mc2, the(cid:374) the (cid:373)ass of the produ(cid:272)t"s the mass of the inputs: less than, nuclear reactions can convert matter to energy (reversible) [circle with + inside] humble proton has mass of 1. 00728 units. Figure 3(credit: prof. gaensler: what comes out has less mass than what went in. Figure 5(credit: prof. gaensler: net result of the proton-proton chain, a kind of nuclear fusion. Clicker quiz: which of these phrases most accurately describes how the sun generates energy: fuses particles, converting mass into energy. Figure 6(credit: prof. gaensler: neutrinos only interact with other matter through weak nuclear force & gravity.