| Topic: |
Science > Physics |
| User: |
"Euler Cheung" |
| Date: |
16 Jul 2006 11:34:11 AM |
| Object: |
Electromagnetic field bend the space? |
Could we consider the Electromagnetic field bend the time-space as
gravity bend the time-space. We can envision that Electromagnet matter
is going in straight line except its time-space is curved, therefore
an electron is moving in circlar orbit in the atom. It also followed
that presence of strong E-M field would slow down the passage of time
similar to gravty. Why is gravity assigned such a special role that
no other field could match?
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| User: "Igor" |
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| Title: Re: Electromagnetic field bend the space? |
17 Jul 2006 12:39:40 PM |
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Euler Cheung wrote:
Could we consider the Electromagnetic field bend the time-space as
gravity bend the time-space.
Some people think that it might directly, but GR shows that it can at
least indirectly. EM fields have energy densities and hence can act as
a source for gravitational fields, which are literally the curvature of
spacetime. These are sometimes referred to as "Einstein-Maxwell
solutions".
We can envision that Electromagnet matter
is going in straight line except its time-space is curved, therefore
an electron is moving in circlar orbit in the atom. It also followed
that presence of strong E-M field would slow down the passage of time
similar to gravty.
Any energy density capable of curving spacetime would have roughly the
same effect.
Why is gravity assigned such a special role that
no other field could match?
Good question! The main problem right now is that our theory of
gravity (GR) is written in the language of differential geometry of
spacetime, whereas the other three fundamental forces (EM, weak and
strong) are written in the wave function formalism of quantum
mechanics. The good news is that modern quantum gauge theories also
employ differential geometry just like GR does. The bad news is that
nobody has yet figured out how the two fit together, if they actually
do.
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| User: "Jim Black" |
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| Title: Re: Electromagnetic field bend the space? |
16 Jul 2006 03:26:41 PM |
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Euler Cheung wrote:
Could we consider the Electromagnetic field bend the time-space as
gravity bend the time-space. We can envision that Electromagnet matter
is going in straight line except its time-space is curved, therefore
an electron is moving in circlar orbit in the atom.
The electron doesn't move in a circular orbit about the nucleus; that's
the outdated Bohr model.
It also followed
that presence of strong E-M field would slow down the passage of time
similar to gravty. Why is gravity assigned such a special role that
no other field could match?
Particles with different charge/mass ratios move differently in an
electromagnetic field, but gravity makes all things fall the same way.
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| User: "uri" |
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| Title: Re: Electromagnetic field bend the space? |
16 Jul 2006 01:55:58 PM |
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What is space? Space is just an artifact of the mind.
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