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SO brightness of bulb. Does it depend on the resistance or current in it?I have two bulbs keeping everything same except resistance. So Bulb A - high resistance Bulb...
Asked on 12/06/2021
3 answerWhen I read about radiative forcing due to CO2 it says:"Radiative forcing is a measure of the influence a factor has in altering the balance...
Asked on 12/06/2021
2 answerI searched and viewed similar questions on here but still am very confused. Is it because of the observer's inertia? If so, shouldn't we feel a 'push' towards the point...
Asked on 12/06/2021
2 answerI got confused while reading about the cosmological redshift. Take an expanding Universe. If you look a galaxy moving with the Hubble flow, you will see the light...
Asked on 12/06/2021
2 answerThe standard (mathematicians') basis for the $mathfrak{su}(2)$ Lie algebra is:$$X_j = -ifrac{sigma_j}2$$ where $sigma_j$ are the Pauli matrices. In physics, observables correspond to real numbers, so...
Asked on 12/06/2021
3 answer2D ising model explains phase transition (Para-ferro). How come a 2-D model explain a system where spins are distributed in all three directions?...
Asked on 12/06/2021
1 answerI think for radio antenna transmitters, if the AC current's frequency is at the frequency of radiowaves, EM waves in the radio frequency will be emitted? Then the frequency has...
Asked on 12/04/2021
1 answerThe book "Introduction to Optics" by Frank, Leno, and Leno Pedrotti, Ed 3, makes the claim that It can be shown that if the reconstructing light of wavelength $lambda_r$ is...
Asked on 12/04/2021
1 answerI am trying to represent the tight-binding Hamiltonianbegin{equation}hat{H}_{TB} = sum_{sigma} sum_{alpha,beta} sum_{mathbf{R}_1,mathbf{R}_2}t^{alpha,beta}_{mathbf{R}_1,mathbf{R}_2}hat{c}^{dagger}_{alpha,mathbf{R}_1,sigma}hat{c}_{beta,mathbf{R}_2,sigma}label{eq:Htb}tag{1}end{equation} in the momentum space, and it is not clear this...
Asked on 12/04/2021
1 answerEven though double well is a $mathrm{1D}$ potential and it must not have degenerate spectrum, then why does double well have degenerate energy eigenvalue?...
Asked on 12/04/2021
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