Questions tagged [matter]

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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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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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2answers
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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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1answer
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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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Number and Types of States of Matter

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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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
92 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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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
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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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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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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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2answers
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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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1answer
34 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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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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3answers
75 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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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
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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
60 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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2answers
68 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
34 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
51 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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1answer
42 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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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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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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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
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$\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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2answers
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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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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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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
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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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2answers
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Radiation originates due to emission by matter but its transport does not require any matter… Expand?

excerpt from text: Radiation originates due to emission by matter and that its subsequent transport does not require the presence of any matter. Can someone expand on this. This is quite mind-blowing
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What would happen if our galaxy and an identical anti-matter galaxy annihilated each other?

What would happen if every bit of matter in our galaxy annihilated with an anti-matter equivalent at the same time? Such as that stars completely annihilated with identical antimatter stars, planets ...
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1answer
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Is it possible for matter to occupy a singularity, which is the point of rupture of space time caused by a black hole?

Also, are singularities caused by blackholes reversible? May one do work to reverse the singularity or black hole? Do blackholes create permanent holes in space time, thereby shrinking space time, or ...
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Mass and Gravitational Force [duplicate]

Why do mass has a tendency to attract other masses and form bigger cluster of mass? What cause gravitational force to exist? Is it so that at one point of time all matter in universe will form ...
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2answers
73 views

What is the simplest, smallest matter in the universe? [closed]

per wiki, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms. what is the simplest, smallest matter ...
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1answer
157 views

Materials intermediate in density between osmium and neutronium [closed]

The densest elements on Earth are metals. Osmium is the most dense. The densest matter in the Universe is Neutronium which is not an element but degenerate matter. If we put Osmium and Neutronium on ...
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1answer
44 views

Matter/energy conversion?

What known physical processes convert matter into energy? What known physical processes convert energy into matter?
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1answer
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does matter exist? [closed]

i suddenly think this out of nowhere. suppose when we see for example cells at the micro scale, we will see solid objects and space, and when we see these solid objects at the atomic scale, we will ...
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De-Broglie Wavelength and the Pilot Wave Theory

I researched a lot of questions on De-Broglie waves on this website and discovered a dense fog of confusion amongst everyone. Louis De-Broglie proposed "Matter Waves" and a simple equation describing ...
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1answer
290 views

What has mass but do not take up space?

Loosely speaking matter is anything that has mass and takes up space... so photon has no (rest) mass and I don't know if it takes up space but it already been disqualified due to failing to meet ...
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1answer
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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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Is there any different how we smash antimatter and matter together?

Imagine: Setup A, we smash relativistic electron at a stationery positron. Setup B, we smash electron and positron head on both moving at fraction of speed of light. Setup C, we allow electron to ...
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1answer
67 views

Does matter turning into energy, or vice versa, violate the Law of Conservation? [duplicate]

I'm new to physics. And I have curiously wondering about the relationship between matter and energy. From what I understand, one can create the other, but is it truly creating or just aiding in the ...
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There are 3 things not made of matter [closed]

When I'm teaching middle school science and I'm teaching the concept of matter I usually tell them that everything is made of matter except for 3 things. Space-Time, Energy (light, heat, kinetic, ...
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How is it possible to compress matter infinitely like in a black hole?

How can a star that turns into a black hole technically be smaller than a quark? $10^{12}$ atoms $\geq$ 1 quark. That shouldn't work.
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Does stripping electrons from atoms or adding them affect the state of matter in any way?

Does electric charge affect melting, boiling point or sublimation temperature?
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Does electric charge effect boiling point? [duplicate]

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

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