PCS 181 Lecture Notes - Lecture 2: Radial Velocity, Bohr Model, Astronomy Class

• School: Ryerson University
• Department: Physics
• Course: PCS 181
• Professor: Margaret Buckby

Document Summary

1913: electron is in circular orbit around the proton. If you add exactly right amount of energy to atom(via shaking, electrocuting, applying heat or allowing perfect amount of light (phton) into atom)-> the electron moves to a higher permitted orbit. Hydrogen spectrum : 2 blue , green and red. Ground space/ bohr orbit the first orbit in an atom. Exciation- where an electron moves to a higher orbit by giving it energy. Deexciation where electron moves down an orbit and relases energy naturally. Radial velocity speed of star moving towards or away from u. Take star spectrum if entire end of spectrum is shifted to blue side->shorter distance between wave crests-> moving toward you. If entire pattern is on red side-> larger distance between wavecrest-> star is moving away from you. Obtain spectrum of stationary source (ie hydrogen)-> obtain spectrum of moving source (ie star)-> compare the two. (delta lamda)- wave length difference between lab and stellar spectra.