Crash Course Astronomy

Light (1x24)

Ημερομηνία προβολής: Ιούλ 09, 2015

In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, density, spin, motion, and chemical composition.