AST101H1 Lecture Notes - Lecture 10: Arthur B. Mcdonald, Photon, None Of The Above

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Gaensler

Document Summary

When you watch television, the pictures you see are: emitted, both red and blue light travel at the same speed but the red is longer. A tiny reaction, but this happens 1038times per second: sun"s mass decreases every second by 4 tonnes! The pp (proton-proton) chain (i: problem: chances of four protons all colliding simultaneously is tiny, actually happens in stages. Building up a heavier atom: helium into proton. Fusion only happens in the core: out to 25% of the radius, 50% of the mass, temperature =15 million c, enough fuel for10 billion years(we"re around half-way through) goes. Tiny particles that go through almost anything (including you and me) Where"s the proof? (ii: with heroic efforts, we can detect these neutrinos! (they go through everything, 50,000-tonne tank of water, located 1 km underground, 2015 nobel prize in physics to canada"s art mcdonald.