ASTR 1102 Study Guide - Photon, Joseph Von Fraunhofer, False Color
Document Summary
A black body radiates in a continuous spectrum that depends on the black body"s. Is peak wavelength and t is temperature. Hot objects are blue, cool object are red. They have a thin, cool atmosphere which prevents them from being perfect black bodies. The core of a star is a black body. Blue stars lower luminosity smaller stars red stars. A big red star can have the same luminosity as a small blue star. This is called the hertzsprung - russell diagram. Energy i released from atoms in the form or light when electrons move from high energy levels to low energy levels. The longer the line on the atom moving from one energy level to another the more energy is being absorbed of emitted. When photons are absorbed/emitted they must have the same energy as the difference between the two electron levels. Spectra are like fingerprints elements are in that star.