Recent content by Harry Smith

I am doing a lab and we get silver epoxy resin on our double layered graphene sample where we didn't want it. We can take off the silver paint using ethanol but worry it may destroy the thin layer. Will ethanol be okay to use? Are there any suggestions on what to use?

Thank you so much for your help, George!

Ah, because the spherical harmonics are orthonormal, so we need only consider the states that are already present because the others will have an inner product of zero?

So since L_\pm Y_{\ell m} = \hbar \sqrt{\ell (\ell + 1) - m (m \pm 1)} Y_{\ell (m\pm1)}, we find that ##L_+ Y_{11} = 0##. Using the same logic as before, ##L_- Y_{10} = 2\hbar Y_{1,-1}##, right? Here, my first inference was that since ##\ell## is only valid for ##\ell = 0,1,2,...## then...

I'm reading through my quantum physics lecture notes (see page 216 of the lecture notes for more details) and under the ladder operators section there is a discussion of the expectation value of ##L_x## for a state ##\psi = R(r) \left( \sqrt{ \frac{2}{3}} Y_{11} - \sqrt{ \frac{1}{3}} Y_{10}...

It can be given as either. Percentage error just represents the percentage of the deviation from the value.

By error I mean standard deviation. Apologies. By worst line of fit I mean the maximum mmax or minimum mmin possible gradient achievable from the set of data within the bounds of the error. The x values are 1, 2, 3, 4, 5, 6 with no error so it needn't be considered. The ± 2.29 originates from...

Hi, so I'm currently writing a lab report and need to determine the error in the value of my graphs gradient, m. I have found the maximum and minimum gradient from the 'worst' lines of fit but am lost where to go from there. My data analysis/statistics lecture notes are no help on this topic...