Matter in relation to mass

[Nkumbu Sikaona]

How can energy be converted to mass...what do you think?

[Sensei]

f.e.

Pair production is process in which high energy photon, changes to matter and antimatter:

 

[math]\gamma + 1.022 MeV \rightarrow e^- + e^+[/math]

Electron and positron (electron's anti-particle)

 

Photon must have more than 1.022 MeV = 1022000 eV energy.

1 eV is 1.602176565*10^-19 J

It's 500 thousands more than visible spectrum green photon.

 

 

After exceeding ~2 GeV energy there can be created proton and anti-proton:

[math]\gamma + 1876.544 MeV \rightarrow p^+ + p^-[/math]

(that's 1836.15 times more energy than above 1.022 MeV)

Edited December 14, 2015 by Sensei

[ajb]

How can energy be converted to mass...what do you think?

In modern terms mass is considered as a form of energy; or maybe more carefully you need to take mass into account when balancing energy in any process. For example, we have binding energy of any composite system, that is the mass of the bound system is not simply the mass of the free constituents.

 

Now, I must ask why this is posted in biology? Are you asking about balancing mass and energy in biological systems? If so, then they are subject to the laws of physics.

[swansont]

!

Moderator Note

Moved to physics/relativity