Recent content by Ebi Rogha

That's a great approach! thanks, Chestermiller. I will share this and ask for comments, I will get back to you if I get comments worth discussing. Thanks again

An insulated container (constant volume, adiabatic) contains an Ideal gas with pressure P1 and temperature T1. We open the container's hatch for a few seconds and let some particles escape from the container, then we close the hatch again. We know container's pressure has reduced by exiting...

Thanks for the explanation. I am not sure how to the calculation, if you could please help, that will also help to understand the concept.

Could you pleass explain this?

Suppose we heat up a sealed container of water (no vapour escape), will it mass increase according to E=m.c^2 ?

Thanks Vanadium 50 How about vacuum fluctuation, does it violate energy conservation?

It seems there are different interpretations for them. A popular one is this: ΔE is the uncertainty in the energy measurement and Δt is the uncertainty in the lifetime measurement.

Also, I have heard from physicists that vacuum energy fluctuation (creation and destruction of virtual particles) violates energy conservation. The reason, they justify, is based on uncertainty principle (energy-time form of uncertainty principle), energy can exist and disappear for a very short...

I do not understand when we use elastic approach and when use inelastic approach for: 1- an incident light 2-an incident single photon

Are photons only defined for visible light? If so, there should be a minimum and a maximum energy for photons (according to E=h. f).

What is the application of each of them?

But then I learned a photon can be split into two or even three photons (red-shifted, energy is conserved), and also photon can lose energy and still be a photon (Raman effect, inelastic scattering). Now, I am not sure what it means when it is said photons are quanta of light (smallest unit of...

What I mean is the 2nd law of thermodynamics gives a direction to time, it can travel only in one direction. Does not this mean time is fundumental and all states can not exist together? In other words, the block universe makes no difference between past, present and future, it means time is...

I wonder how physicists who support this theory explain the increase of entropy?