AST101H1 Lecture Notes - Lecture 10: Helium-3, Neutrino, Positron
23
AST101H1 Full Course Notes
Verified Note
23 documents
Document Summary
The red light has a longer wavelength than the blue light, but both travel at the same speed. Problem: chances of four protons all colliding simultaneously is tiny. Two protons 1 deuterium, release positron and neutrino. Proton + deuterium helium 3 nuclei. Helium-3 nuclei + helium-3 nuclei helium-4. Enough fuel for 100 billion years (we are now halfway through) Tiny particles that go through almost anything. Can be detected with 50,000 tonne tanks of water 1 km underground. Each photon of light travels approx 0. 1 mm before being randomly deflected. Hot gas has pressure, which tries to make sun expand. Gravity pulls inward, which tries to make sun collapse. Reflection: looking at a light globe in the mirror. Chair may look red because it scatters red light but absorbs all other colors. Absorption: looking at a light globe through a brick wall. Transmission: looking at light globe through a window. Glass transmits all colors of visible light.
