Is matter still being created?

  • Thread starter DLuckyE
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In summary, matter is constantly being created in the universe, not just at the time of the Big Bang. This occurs through processes such as pair production, where an electron-positron pair is created from a photon. While the total energy content of the universe is fixed, energy can be converted into matter and vice versa. This happens not only in nuclear reactors, but also through natural processes such as the destruction of matter, which is responsible for the natural background radiation on Earth.
  • #1
DLuckyE
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Is new matter still being created from energy in the universe anywhere, or is that something that only happened at the big bang? And is there a known way to create matter from energy?
 
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  • #2
Hi there,

Matter is being created all the time. Are you familiar with the "pair production" process? The process of creating an electron-positron pair from a >1.22MeV photon.

Cheers
 
  • #3
Nope I wasn't aware of that, now I know the name it's a lot easier to find articles to read about it. So thanks for the info :)
 
  • #4
The total energy content of the universe is fixed to the best of our knowledge. This does not preclude the conversion of energy to matter, or vice versa.
 
  • #5
DLuckyE said:
Is new matter still being created . . .
The reverse is also true. Matter gets "destroyed" in nuclear reactors. Or, more accurately, it is converted into a different form of energy.
 
  • #6
Hi there,

Redbelly98 said:
The reverse is also true. Matter gets "destroyed" in nuclear reactors. Or, more accurately, it is converted into a different form of energy.

But not only in nuclear reactors. The "destruction" of matter is a natural process, happening all the time. The natural terrestrial background radiation is the result of this natural process.

Cheers
 

1. Is matter still being created?

Yes, matter is constantly being created through various processes such as nuclear fusion, radioactive decay, and particle collisions.

2. How is matter created?

Matter can be created through nuclear fusion, which takes place in stars and creates heavier elements from lighter ones. It can also be created through radioactive decay, which involves the breakdown of unstable atoms into more stable ones. Additionally, matter can be created through particle collisions, such as those that occur in particle accelerators.

3. Is matter being created at the same rate as it is being destroyed?

Yes, matter is being created and destroyed at a constant rate in the universe. This is known as the law of conservation of mass, which states that matter cannot be created or destroyed, only transformed into different forms.

4. Can matter be created from nothing?

No, according to the law of conservation of mass, matter cannot be created from nothing. It can only be transformed from one form to another.

5. Is there a limit to how much matter can be created?

There is no known limit to how much matter can be created. However, the amount of matter in the universe is constantly changing due to various processes such as the expansion of the universe and the formation of new stars and galaxies.

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