Questions tagged [matter]

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1answer
63 views

Big bang should have made up an equal amounts of both matter and anti matter, then why don't we see such?

So, my question arises that how do we know that normal matter is more in quantity or number than anti-matter? Research at ALPHA said that anti-matter that the spectrum of hydrogen and anti-hydrogen ...
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2answers
41 views

Can we add matter and antimatter to the universe?

Sorry if this is a basic question, or there is a glaringly large hole in my reasoning, I am not smart, and saw a documentary and did some googling, after which I decided to ask people with actual ...
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1answer
40 views

Number and Types of States of Matter [closed]

I wanted to know if there were more than 5 states of matter (man-made or natural) and so I searched it up. Other than solid, liquid, gas, plasma, and Bose-Einstein state, these were varying results ...
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1answer
29 views

Are Dark Matter and Antimatter “states” of matter? What broad category do these fall into?

This question is more to do with what matter is and what matter is not. We know that there is something called matter, which is basically everything we see around us. 17 fundamental particles make up ...
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34 views

How does matter and energy exist in a block universe?

If we suppose that the block universe is indeed true, and that the past, present and future exist simultaneously, then what happens to matter and energy? If matter and energy cannot be created nor ...
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4answers
81 views

How does potential energy increase without increasing matter?

It's a philosopher here - not a physicist, so please bear with me. When I increase the potential energy of a spring by compressing it, I increase its mass according to special relativity. But mass is ...
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0answers
25 views

What can we expect to observe if we were able to observe de Broglie wavelength of massive bodies?

I have seen the famous question where they ask us calculate the de Broglie wavelength of a moving ball but it comes out to be too small and hence we conclude that it is too small to measure by known ...
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2answers
119 views

What are matter waves made of and what is their speed?

We know electromagnetic waves are made of oscillating electric and magnetic fields that can travel at the speed of light without a need for a medium. But, how about matter waves proposed by de ...
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0answers
35 views

Which type of waves are matter? [duplicate]

Since all particles also show wave like nature. Do we know that which type of waves they are? I know they are matter waves but is it an electromagnetic or mechanical waves?
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1answer
32 views

Could it be that at the big bang equal amounts of matter and antimatter were created, but the antimatter got stuck in black holes? [duplicate]

I recently watched PBS spacetime's video series on the black hole information paradox. Where they first discussed the no hair conjecture and then later also the true destruction of information by ...
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2answers
1k views

Is anti-matter a viable source of energy? [closed]

I was wondering whether it is possible to harness energy created by small anti-matter/matter particle annihilations. I known that when they meet, a huge flash of light is produced by high energy gamma-...
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2answers
80 views

Is direct, complete conversion of matter to energy theoretically possible?

I know that small amounts of matter can be converted to energy via chemical and nuclear reactions, and that complete conversion is possible if matter meets anti-matter. Other types of conversion might ...
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3answers
107 views

What is matter really made up of?

We know matter is made up atoms, and atoms are made up of protons, neutrons, and electrons. And we know that protons and neutrons are made up of smaller particles known as quarks. Would probing deeper ...
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1answer
2k views

If atoms are mostly empty space, why doesn't light pass through everything?

Atoms are mostly empty space, and although I now understand why matter doesn't pass through other matter, why don't photons pass through the empty space of the atoms? Is it the same sort of idea as ...
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0answers
18 views

Why don't matter bosons, like any non-ionized atoms with even numbers of protons and neutrons, fall through each other like ghosts?

Obviously, two chunks of pure Iron-56 won't pass through each other like photons go right through each other... Why is that?
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2answers
71 views

Is the Accretion Disk of a Black Hole just an illusion?

As a matter of fact, I recently learnt that as an object is approaching a black hole, to an outside observer the object seems to be getting slower and slower and will cross the event horizon after an ...
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1answer
75 views

Are there other theories than gravitational attraction taken into account as a reason for the extreme accumulation of matter in the universe?

This question is about how small the interstellar density is (less than 1 atom per cubic centimeter). But although the interstellar density is very low, matter tends to extremely aggregate in certain ...
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1answer
205 views

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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1answer
30 views

Is it possible to make hibrid atoms? [closed]

Is it possible to make an atom which is half matter and half antimatter (mostly meaning that it's particles are equaled) ? And if it would be possible, how this atom would behave comparably with its ...
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0answers
24 views

Could antimatter have disapeared from the universe simmilarly as observed matter from collisions of black holes?

As matter inside a neutron star or black hole can vanish through collisions could be possible that antimatter did so more than matter in the very beginning of the universe through a high energetic ...
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2answers
199 views

What is the difference between atoms, particles and matter?

So I'm in year 10 (9th grade for the Americans) and I just had a question about physics. What is the difference between atoms, particles and matter? Are they all the same thing and people just use the ...
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6answers
3k views

Can mass be defined in purely mathematical or geometrical terms?

Like curvature of a geometrical shape, is there any purely mathematical explanation for what is mass? Or is it absolutely a physical quantity in which case this question has no meaning? I thought that ...
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1answer
39 views

“Solids have distinct boundaries” meaning

That may sound very silly questions but believe me I'm unable to understand that . I'm unable to visualise how solid can be said to have distinct boundaries . Please help me so I can make the picture ...
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0answers
47 views

Given a random distribution of matter in the universe, what's the frequency of permutations of ordered matter?

I know matter isn't purely randomly distributed since it clumps together from various forces acting on it constantly, but I just want to discuss randomly distributed matter. Unless, there is a way to ...
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5answers
3k views

How would neutron matter appear to the naked eye?

Neutron matter is matter comprised entirely of neutrons, as it exists in neutron stars. Most optical phenomena encountered in everyday life, such as light reflection and spectral absorption (i.e. ...
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3answers
79 views

Why is there matter when all of it should have annihilated with antimatter?

The theory is that after the Big Bang, photons turned into matter and antimatter particle pairs, but they should have all annihilated with each other. Since there would be an equal amount of matter ...
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0answers
27 views

When Matter condensed — the condenser

Did gluons, quarks, and electrons first appear at the same age of the universe or was one first?
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1answer
49 views

What happens to weight when ice melts? [closed]

A block of ice is weighed in a container. Then, it is left out to melt. Would the weight of the water be greater, less than, or equal to the ice? I know that it has something to do with density and ...
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1answer
64 views

Can de Broglie Waves have frequency, just because we know de Broglie wavelength formula? [duplicate]

Sub-question if Yes: de Broglie wave is also often called the matter-wave. While we can find the frequency of an Electromagnetic Radiation from its wavelength $(c=\nu\lambda)$. $c$, in this case, is ...
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1answer
133 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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2answers
69 views

How the electric charge of 1 electron is distributed over its volume?

Can we say the electric charge density of an electron is distributed uniformly over its spherical volume?
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1answer
42 views

Infinite distribution of charge vs infinite distribution of matter

From my textbook: General Relativity is the currently most complete theory of Gravitation, and should be used to describe physical systems each time one of the following assumptions does not hold: ...
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1answer
1k views

What would strange and charm matter look like?

Scientists have studied and detected the different types of quark matter over the last decades, from up to strange. While we obviously know how matter composed solely of up and down matter looks like, ...
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1answer
44 views

Change of flavour in strong interactions?

Sorry if this question has been asked already but after researching I have found that quark flavour is not changed in the strong interaction. This confused me because how can a down and anti down ...
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1answer
53 views

Are energy and momentum imposed by purely geometrical properties of spacetime?

If we defined spacetime as a purely geometrical (not physical) structure of the kind that is in general relativity (a 4-dimensional Lorentzian manifold), would it automatically have properties that ...
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3answers
2k views

What is the meaning of “matter” in physics?

What is the meaning of matter in physics? By defining matter in terms of mass and mass in terms of matter in physics, are we not forming circular definitions? Please give a meaning of "matter" in ...
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1answer
130 views

How do photons create matter?

How exactly do photons create matter? I really have a hard time understanding this. I've seen an explanation where they use other, virtual particles to create electron and positrons, but even then, I ...
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1answer
44 views

Reasonable ways to couple matter with metric

In general relativity without matter, the equation of motion of the metric field is described by the Hilbert's action or the Einstein tensor $G$. It's natural to lead to this conclusion once one ...
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1answer
51 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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0answers
19 views

Magnetoelectric effect

I am trying to find a concise and clear paper/book/reference in which there is a proof of the fact that any chiral molecule shows magnetoelectric effect. Could someone help please?
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0answers
20 views

Are all of the objects that composed the Bose-Einstein condensates absolutely can't be distinguished from each other?

Are all of the objects (e.g. photons or bosons) that composed Bose-Einstein condensates (BECs) literally can't be distinguished from each other? It was said several times on the Internet and many ...
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1answer
24 views

$\mu \rightarrow \infty $ in magnetized cylinder

Please don't see this as a homework question, for I have already solved the problem and all I'm trying to do is understand the results and make a correct interpretation. In a cylinder made out of ...
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0answers
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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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8answers
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Why isn't dark matter just ordinary matter?

There's more gravitational force in our galaxy (and others) than can be explained by counting stars made of ordinary matter. So why not lots of dark planetary systems (i.e., without stars) made of ...
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2answers
65 views

Why is vapor from boiling pots hot while vapor caused by air is not?

So when we boil water, the resultant vapor (steam) is hot. But when water is evaporated by air or by atomization, the vapor is cool?! Both water's have absorbed energy from the surroundings and thus ...
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5answers
1k views

Are bosons matter?

The title explains the question. Are bosons matter? As I have seen, there are three answers to this question: No, only fermions are matter. Yes, but only those with mass. Yes, all bosons are matter. ...
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What do we know about the features of Dark Matter? [closed]

In 2020, how much information have we got about this matter? I'm just curious.
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1answer
46 views

Is the wavelength of matter proportional to momentum or uncertainty thereof?

I am confused about de Broglie waves and their relationship with the uncertainty principle. Both have similar formula and seem to be the same thing with a slight conceptual difference. De Broglie ...
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3answers
94 views

Expansion of space or contracting of matter? [duplicate]

Can the expansion of the Universe effect be explained by contraction of the overall matter instead? That is, all material objects are in fact contracting, due to what the universal space seems (and ...
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1answer
45 views

Is there work done on a mass from matter-antimatter pairs?

Imagine I have a vaccuum at very low temperature and I put a single neutron in, then gamma rays interact to form matter-antimatter pairs within this vaccuum and assume that this happens extremely ...

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