Physics Questions, Problems & Solutions : TransWikia.com ~ Page 223

Is there no way to bypass greenhouse gasses by converting excess heat to longerwave radiation?

The problem with greenhouse gases, as I understand it, is that they absorb and emit radiation within the thermal infrared range leading to increased temperatures on Earth. According to some...

Asked on 06/30/2021

1 answer

Assumption of molecular chaos

Assumption of molecular chaos in statistical mechanics states that the incoming velocities of two colliding particles are uncorrelated. Now, since it introduces a direction of time, this hypothesis obviously...

Asked on 06/30/2021 by X.L

1 answer

How are sources described in gauge theory?

Let's only assume the case of electromagnetism. If one varies the Yang-Mills-Functional one gets the Yang-Mills-equation $*d*F=0$. The whole theory can be geometrically described on principal bundles. On the...

Asked on 06/30/2021

1 answer

Identity regarding problem 2.4 of Walds General Relativity

I was going through some of the problems in Wald's General Relativity and in problem 4 chapter 2 I found something that confuses me. So, basically we are asked...

Asked on 06/30/2021

0 answer

I want to know does holograms image in different angle of views are created as interference of hole image in that direction or is some thing else?

let assume we put a camera in different positions towards hologram ,in specific ccd in array capturing image(I don't know if this is how it stores image or not!) ,...

Asked on 06/30/2021

0 answer

Can civilizations orbiting black holes keep time with their interstellar travellers?

Due to relativistic-velocity interstellar travel time dilation, travellers would return in the far future of any civilization launching such an effort. A chart from wikipedia indicates typical time dilation ratios...

Asked on 06/30/2021

1 answer

On contractions and S-Matrix in $phi^4$ scalar theory

If you have a self-interacting Lagrangian for a scalar field theory: $$L= L_0 + L_I = frac{1}{2} (partial_muphi)^2 - frac{1}{2} m^2phi^2- frac{g}{4!}phi^4$$ where $g$ is the coupling constant,...

Asked on 06/30/2021

1 answer

Why does MWI need decoherence theory and how can these models be combined?

As far as I understood decoherence theory, it explains, why we are not able to measure superposition of macroscopic objects in some specific basis, which turns out to be the...

Asked on 06/30/2021 by psicolor

1 answer

Do bodies need to be in contact to be in thermal equilibrium?

In this wikipedia article, it is written that:Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they...

Asked on 06/30/2021

1 answer

How the electrostatic energy of attraction is minimum in the ground state of an atom?

In the definition of the ground state of an atom, it is given thatThe ground state is one in which the electrostatic energy ofattraction is minimum. This state is...

Asked on 06/30/2021 by D buiss

2 answer

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