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Apr
5
comment Sum of independent errors
@KyleKanos but I don't think that my sources of variation are normally distributed.. If you are sure that I'm wrong, could you explain me why, please?
Apr
5
comment Sum of independent errors
@KyleKanos the difference is that in my question my errors are both systematic :)
Apr
5
asked Sum of independent errors
Apr
5
accepted Atomic transitions and density: clarification
Apr
5
comment Atomic transitions and density: clarification
Ok, thanks, I'll ask for it! :) I have just updated the question. If you could answer to the last question, I'll be so grateful!
Apr
5
revised Atomic transitions and density: clarification
added 695 characters in body
Apr
5
comment Atomic transitions and density: clarification
I'm sorry. They didn't give me detailed information about "rubidium cell", they told "on the net, you can find data about density and temperature".
Apr
5
comment Atomic transitions and density: clarification
Thanks, I have understood your explanation, but how can N be a constant? cfa.harvard.edu/~dphil/work/rbmaser/masernotes.pdf
Apr
5
asked Atomic transitions and density: clarification
Mar
27
awarded  Popular Question
Feb
15
comment Doppler broadening: time scale to frequency scale
@JohnRennie updated question!
Feb
15
revised Doppler broadening: time scale to frequency scale
added 375 characters in body
Feb
15
accepted Equivalent temperature: laser and cell containing Rb
Feb
15
asked Doppler broadening: time scale to frequency scale
Feb
14
comment Spectroscopy: clarification about doppler shift
@DumpsterDoofus it is the only way that comes to my mind...
Feb
14
comment Spectroscopy: clarification about doppler shift
@DumpsterDoofus so many thanks for your kindness! If I don't know the temperature and have to estimate $\Delta v$ looking to the graph (on x-axes we have time), can I find the FWHM of the peaks and and than calculate $\Delta v$ as $1/ \Delta t$?
Feb
14
comment Spectroscopy: clarification about doppler shift
@DumpsterDoofus oh yes! I'm sorry! There was an error of translation! I'm asking for "doppler broadening" and not "Doppler shift"! Excuse me!
Feb
14
comment Spectroscopy: clarification about doppler shift
@DumpsterDoofus I haven't a course of Spectroscopy and I know very few things of spectroscopy.. I can tell you that it was told me that the triangular wave was needed to identify the peaks of absorption and that $\lambda$=780 nm. When I said "when the rubidium is resonant", I meant "when the rubidium absorbs makes the transition". I hope this can make clearer my question, I'm sorry..
Feb
14
comment Spectroscopy: clarification about doppler shift
@DumpsterDoofus Mmmh.. really? 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. You can see the output in the upper signal. It is given by the difference between input signal and the signal received by the photodiode... But my question is about the interpretation of the doppler shift looking to the graph..
Feb
14
comment Spectroscopy: clarification about doppler shift
@YungHummmma in downward there is a triangular wave and the upper signal is what you see if a Rubidium cell is enlightened by a laser. (I have updated the question)