Physics Questions, Problems & Solutions : TransWikia.com ~ Page 189

What kind of causality would be broken if black hole singularities would be real?

In his article "The Universe as a Whole" 1, physicist Dennis Sciama saidWe therefore face a crisis in theoretical physics. Either classical general relativity breaks down, or...

Asked on 07/13/2021

0 answer

How does $U(x,t;x',0) to delta(x-x')$ as $t to 0$ preserve the norm?

If the propagator approaches the dirac delta as the difference in time decreases then we would expect$$lim_{t to 0} langle Psi(x,t) | Psi(x',0) rangle$$$$int_{- infty}^{+ infty}...

Asked on 07/12/2021

1 answer

Can the temperature fluctuate in a system described by the Boltzmann distribution?

From what I understand, for a system A in thermal equilibrium with a heat bath B at temperature $T$, the Boltzmann distribution gives the probability of finding $A$...

Asked on 07/12/2021 by rkp8000

0 answer

Coordinate transformation for coordinate basis vectors

Consdier a coordinate transformation $x^arightarrow x^{'a}$ on a manifold with coordinate basis vectors $textbf{e}_a$ and $textbf{e}^{'}_a$. The relationship between the coordinate basis vectors $textbf{e}_a$ and ...

Asked on 07/12/2021

1 answer

Entropy change for an irreversible process

I have been stuck for hours now on this thing. While going through my thermodynamic lectures, I came across this: 'The entropy change for the system for an adiabatic irreversible...

Asked on 07/12/2021 by Anveshak Singh

2 answer

How does the Kraus operator act on a state given by the direct sum of different states?

Let's say i have a state of the formrho_net = q *({summation over i} pi |i><i|)⊕ (1-q)rhohere i = 1-n and the so called "basis" in which the...

Asked on 07/12/2021 by Ingita Banerjee

0 answer

Reason for Uncertainty principle

$$Delta x Delta p_x geq frac{hbar}{2} $$ I understand what does Heisenberg's uncertainty principle states i.e. it's definition and it has been proven experimentally. But, can anyone please...

Asked on 07/12/2021 by 23rduser

3 answer

Deriving Brewster's Law

Actually, I have completely understood Brewster's Law, but I have not understood the assumption in the beginning. Why is it that the reflected light is completely polarised and the refracted...

Asked on 07/12/2021

0 answer

Is there a Maximum Data Density of a Physical Volume?

Is there an established or proven relationship concerning how much data can fit in a given volume of space / spacetime?...

Asked on 07/12/2021

1 answer

What is the current status on black hole information paradox?

I assume information must be somehow preserved either by time dilation so object can take its time to reach the horizon and hawking radiation slowly kicks the information out as...

Asked on 07/12/2021

2 answer

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