Recent content by dziech

That clicked! :D I can finally sleep peacefully ;) Thanks!

Am I just thinking of this the wrong way? I mean, Δν is a linewidth in frequency. Say it's 60GHz, the Δλ should be like 0.2nm at 1um, but it would be -0.2nm wouldn't it? Or should I think of it as Δν change in linewidth? But that doesn't make obvious sense to me. It's one of the questions I...

Hi guys, It's one of the questions I'm asking myself needlessly but I really wonder about this ;) Say I have a laser at a wavelength λ. I can calculate the frequency by ν=c/λ. Then the linewidth Δν=cΔλ/λ2 that can be found through differentiation of two sides of the equation. The question is...

Yes, sorry, sometimes I forget to keep things straight forward : ) Ok, great - this is exactly where I got stuck: the derivative with respect to ##\tau## will in the end include time wouldn't it ? So : ## f = T_{ambient} + (T(0)-T_{ambient})e^{-kt}## Now I keep the t as a constant (if I...

Ok, maybe more context will help : ) I have samples of a solid cooling down. I do data fitting with Levenberg Marquardt algorithm to find ##\tau## - time constant of the exponential function. Now I want to calculate the uncertainty of the time constant ##\tau##. Let's put it simple - what are...

I asked my question in a wrong way. The uncertainty i want to measure is the one if the time constant. Then it's a function of tine and temperature. The question remains, is the t value that stays in derivative a value over i made my calculations? It makes sense if i take the uncertainty of the...

Hi guys, I have a silly question, but I seem to be confused about it. Let's say I have a function of Newton's cooling law. I measured the exponential drop of the temperature of some system and now I want to make an error analysis. Do I treat this function as a two variable function of tau (time...

Hey plasma1, Just a quick thoughts about that plasma project. Firstly, I think that the plasma is not created by UV light, the UV is created due to the chemical reactions on the sun - nuclear fusion. Correct me if I'm wrong ; ) Secondly, scientists are already working on creating the...

Thank you all for replies. I've been traveling a bit, so sorry for a long delay. Anyway, I am now getting through that thick paper you suggested... really hard stuff in there for me. But I am trying :) Also, if I understand correctly, Gerchberg Saxton should work if I also involve some...

Good morning, Before all, I also posted a question to maths forum, but I am convienced that this is the forum I was more like looking for. Firstly, hello to this forum, secondly I want to apologize if this is not a place I would like to post a question like that, maybe in another thread ?; )...