Questions tagged [matter]

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How can a negative strangelet convert matter in strange matter?

How can a strangelet convert matter into strange matter? Because strange quarks are heavier than up and down quarks wouldn't you loose energy by converting regular matter into strange matter? And are ...
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523 views

Richard Feynman - QED: The Strange Theory of Matter and Light

After reading the book QED: The Strange Theory of Light and Matter, an adaptation of four lectures Richard Feynman gave at the University of Auckland, I gained a greater understanding of QED. I am not ...
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Does electric charge effect boiling point?

Does stripping electrons from atoms or adding them effect the state of matter in any way?
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What is the critical volume/mass of non-deuterated water that appears blue to our eyes?

A glass of water appears clear, but a swimming pool appears blue. At some point there must be a switch and I am wondering if anyone knows what that point is (or if its so gradual we can't tell). Does ...
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1answer
52 views

contradiction between total photon energy in the universe and early matter antimatter ratio

When looking at the energy count in the Universe, on one hand we are told dark energy 68%, dark matter 27%, regular matter 5%, neutrinos and photons a very small fraction (trace like). https://en....
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Is space not truly an empty vacuum but instead made up of densely packed particles of matter and antimatter?

In the livescience.com article Superpowered Chinese Lasers Could Soon Rip Open Raw Vacuum I read that quantum electrodynamics states that the vacuum of space isn't empty, rather it's made of densely ...
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30 views

Does stripping electrons from atoms or adding them effect the state of matter in any way?

Does electric charge effect melting, boiling point or sublimation temperature?
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1answer
27 views

What is the minimum amount of matter do I need to call it “bulk” matter?

I had been reading about bulk properties, but was confused what should the minimum amount of matter be for these properties to hold. For eg: Intensive thermodynamic variables will not remain ...
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98 views

Does dark-matter attract itself with gravity as light-matter does, and if so where are the dark stars and galaxies?

Does dark-matter interact with gravity like light-matter does, or does dark matter interact only with light-matter via gravity?
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39 views

Acceleration from scalar-matter coupling in classical field theory

I have came across a text where an interaction term in a classical Lagrangian is presented that couples a matter density $\rho$ and a scalar field $\phi$ as \begin{equation} \mathcal{L}_{\text{int}} =...
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62 views

If matter cannot be transformed into information, why do we say that information about matter is lost when we talk about black hole paradox?

In this question it is said that matter cannot be transformed into information: Can matter be converted to information? But when we talk about black hole information paradox, we say that matter ...
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Can strongly radiating matter cause dark matter to clump?

Ordinary matter clumps under gravitational attraction only when it loses energy through radiation. Dark matter supposedly doesn't clump since it can only exchange energy with itself and ordinary ...
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35 views

How were the particles created from the vacuum state, in the beginning of the universe?

How were the particles created from the vacuum state, in the beginning of the universe? If the particles are created when some energy is supplied to vacuum state, then how were particles created? ...
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1answer
54 views

Would “gravity” and the “law of gravity” have a meaning in a universe without matter?

I was discussing the fact that if there was no matter in the universe, just vacuum and radiation, can we say that anything called gravity wouldn't exist? In that universe, the Friedman equations ...
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108 views

How do trace element abundances show that dark matter exists in both baryonic and non - baryonic forms?

I can't seem to find an answer to this question anywhere, any help would be greatly appreciated. Thanks in advance.
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122 views

Dirac representation between matter and anti-matter

If $|\psi \rangle$ represents a wavefunction through a column matrix and $\langle \psi |$ represents the dual vector in a row matrix and $|\psi \rangle \langle \psi | = \rho $ is the probability ...
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1answer
509 views

Lagrangian density for classical electrodynamics in matter

I've been unable to find any references for the lagrangian density in presence of matter. It's a lot easier to find this expressions in vacuum, but, when it comes to matter, I couldn't find any clear ...
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Incorporating matter effects on active-sterile neutrino oscillation with mathematica

I recently wanted to study the effect of a constant matter potential on a simple 2-flavor active-sterile neutrino oscillation system using Wolfram Mathematica, but I encountered a big problem in the ...
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1answer
58 views

What if there was no baryon-antibaryon asymmetry in our universe?

We know that the universe goes through different evolutionary phases: radiation, matter and later dark energy epoch. What would happen if there was no baryon-antibaryon asymmetry? How would the ...
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28 views

Matter Standing Waves means 0 probability?

de Broglie standing waves are waves that represent the probability of finding an electron somewhere. In an atom, these waves must become standing waves in order to ensure that no destructive ...
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2answers
32 views

What happens if matter particle and antimatter particle both carry no charge were to collide elastically?

I read that particle carrying charge is able to interact with photon so that when electron and positron collides they may be converted into pure photons, then what about neutron-antineutron collision? ...
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27 views

Neutrino oscillation in earths matter: electron-, proton- and neutron density

I want to incorporate an estimate of a matter effect in atmospheric neutrino oscillations into a model including active and sterile neutrinos. Since neutrinos are not only created in the atmosphere ...
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25 views

Clarification on Phase wave derivation in De Broglie's paper

De Broglie's paper refers to his theorem A periodic phenomenon is seen by a stationary observer to exhibit the frequency $ν_1=h^{-1}m_0c^2\sqrt{1-\beta^2}$ that appears constantly in phase ...
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706 views

What exactly is Excitonium matter?

After 50 years of theories and thwarted attempts, scientists have finally proved the existence of a new form of matter. The never-before-detected condensate is called excitonium, a name first coined ...
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59 views

Why the rate of Z boson decays produce 3 generations of matter?

I read a tons of article about Z boson, I know it is a carrier of weak force similar to photon except it is much much more massive than an electron and it is extremely short lived. Sadly almost all ...
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1answer
118 views

Black hole's time effect and matter (or energy) position

Ok, so after I've read a few (around 50 :P ) articles on subject of black holes. There are a few gaps in my understanding of it. Please follow my reasoning, I bet there is a mistake in there, and I ...
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150 views

Liquification of gas

During the process of liquification of gas the volume of gas suddenly decreases in the region BC. what happens in the gas which causes such an abrupt change in its volume at a constant pressure?
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26 views

Does the knowledge of a material's atomic structure provide sufficient data to predict its behavior with matter?

What are the properties of a material on an atomic point of view that define its behavior? The whole world around us consists of atoms of varying numbers of electrons, protons and neutrons. Suppose ...
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317 views

Does the analogous saying: “matter is essentially 'condensed' energy” have any merit?

Einstein in his derivation of special relativity came upon the equivalence of energy and matter, and given the right circumstances, the relation can go either way - matter can become energy, and ...
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61 views

Do stress and strain contradict each other?

According to the book Engineering Physics by R.K Gaur and S.L Gupta Strain: Strain is a fractional deformation produced in the body when it is subjected to set of deforming forces. Stress: The ...
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66 views

Asymmetry vs. Simple Statistics WRT Matter / Antimatter Ratios

I'm not clear on why physicists suspect, and are looking for, an asymmetry in nature that favors matter over antimatter. Here's a simple thought experiment to illustrate my confusion: Assume I have ...