ASTRO 001 Study Guide - Midterm Guide: Absorption Spectroscopy, Dark Matter, Spectroscopy
1 Nov 2017
School
Department
Course
Professor
Document Summary
Light has properties of both a wave and a particle: particle of light is called a photon, electromagnetic spectrum from high energy to low energy, gamma rays, x-rays, uv, visible. Telescopes: reflecting telescopes have a mirror whereas refracting telescopes have a lens. Uv, & ir: they give clearer images without atmospheric blurring, reasons why telescopes below earth"s atmosphere are worse. It is hard to get a very large collecting area launched into space. Ellipses are nearly circular in our solar system: 2nd law = a line joining a planet and its star sweeps out equal areas during equal intervals of time. Well, 23=2x2x2=8and 33=3x3x3=27so a must be much closer to. You would be given choices that made it pretty obvious which answer is correct like 1au, 2. 08au, 3. 08au, 9au, and 9. 7au. Mercury: can only see close to sun, and hard to do with the naked eye.
