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All equation's I've seen for Millikan's oil drop experiment involve quantitatively knowing the Voltage beforehand. I don't see a way to calculate the Voltage using Coulomb's law without knowing the...
Asked on 06/01/2021
2 answerA projective unitary representation of ${rm SO(3)}$ satisfies $$U(R_1)U(R_2)=e^{iphi(R_1,R_2)}U(R_1R_2)tag{1}$$ where $R_1,R_2in {rm SO(3)}$. How to show that the $j=1/2$ representation, $U(R(theta,hat{bf n}))=e^{i{sigma}cdot{hat {bf n}}theta/2}$, is...
Asked on 06/01/2021
2 answerwhen we consider the coupling of angular momentum between different electrons, we tend to only take L_1 & L_2 coupling, L_1 & S_1 coupling, S_1 & S_2 coupling and L_2...
Asked on 06/01/2021 by Oswin Leung
0 answerIn the case of single slit diffraction, is it necessary that the distance between slits must be less or equal than the wavelength of light in order to calculate angular...
Asked on 06/01/2021
0 answerIt is known that the lower critical dimension (LCD) $d_l$ of the Ising model is $d_l=1$, that the LCD of the Edwards-Anderson model is ...
Asked on 06/01/2021 by valerio
1 answerLet $A=A^+ +A^-$ where $A^+,A^-$ denote the creation and annihilation portion of the field. Then in Eduardo Fradkin, Field Theories of Condensed Matter Physics, equation (5.284), it states...
Asked on 06/01/2021
1 answerCan someone explain me the first step (highlighted with red arrow)to calculate the field integral in tongs lecture of string theory Thank you.. ...
Asked on 06/01/2021 by Gui
0 answerSuppose I have a ball of a certain radius inside a box (with the length bigger than the radius) such that the ball fits in the box. The ball has...
Asked on 06/01/2021 by SebiSebi
2 answerIn scattering amplitudes, page 244, I am trying to verify that $$p_{adot{b}} = left( begin{matrix} -p_0+p_3 & p_1-ip_2 p_1+ip_2 & -p_0-p_3 end{matrix} right),...
Asked on 06/01/2021
0 answerI know this is a stupid question but according to the coloumb's formula for electric field, if I have a charge right next to another similar charge, such that the...
Asked on 06/01/2021
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