PHY 121 Lecture Notes - Lecture 23: Chlorofluorocarbon, Ozone Depletion, Ultraviolet
11 Dec 2016
School
Department
Course
Professor
Document Summary
Phy 121 lecture 10/17/16 intro to climate change. On the visible light spectrum, the human eye peaks around the color green. If you entered space and looked at the earth you would see a tiny layer of atmosphere. Natural ozone is o3 which is somewhat dangerous to humans. +it"s good i(cid:374) the upper at(cid:373)osphere a(cid:374)d (cid:271)ad o(cid:374) the surfa(cid:272)e to hu(cid:373)a(cid:374) health. Ozone is good in the upper atmosphere because it absorbs a lot of ultraviolet radiation. In the late 1980s, scientists noticed a hole forming in the ozone layer above antarctica. 2 compounds were causing ozone depletion: chlorofluorocarbons and. Ozone forms in the stratosphere through a process of photolysis. O2 + photons = o + o (slow process) O2 + o = o3 + heat (fast process) Cycle between 2 and 3 in a healthy system. The ozone layer has been repairing itself since 2006 so there is some hope.
