Spectroscopy: clarification about doppler shift


by bznm
Tags: clarification, doppler, doppler effect, laser, shift, spectroscopy
bznm
bznm is offline
#1
Feb14-14, 04:06 PM
P: 62
I've just begun to study spectroscopy, and I need a clarification about the Doppler Effect.

Consider a cell containing Rubidium and enlight it with a laser. Connect the system with an oscilloscope and give a triangular wave as input (so you can know when the Rubidium is resonant). This is the signal that you see downward in the graph. You can see the output in the upper signal.

Click image for larger version

Name:	2014-02-14-192035_1280x1024_scrot.png
Views:	2
Size:	33.2 KB
ID:	66629



could you explain me how I can see the doppler shift related to the deeper peak and how I can calculate it?

I'm confused because I haven't a course of Spectroscopy and this aspect was treated very very quickly in another course... is the doppler shift the inverse of the FWHM of the peak?
Phys.Org News Partner Physics news on Phys.org
Vacuum ultraviolet lamp of the future created in Japan
Understanding the energy and charge transfer of ions passing through membranes
High-temperature plasmonics eyed for solar, computer innovation

Register to reply

Related Discussions
Doppler Shift as Applied to Nuclear Structure and Spectroscopy Advanced Physics Homework 0
Astronomical spectroscopy and doppler shift. General Astronomy 9
Doppler shift clarification Special & General Relativity 7
Please Help. Radio Spectroscopy -> Finding the doppler shift in a graph Astrophysics 1
Doppler shift and red/blue shift General Astronomy 4