Energy spacetime warping
If energy warps spacetime, then does light warp spacetime?
And if special relativity says that things near the speed of light increase in relativistic mass, then does light have a relativistic mass?
Also, if energy warps spacetime then is it possible to have a black hole form from pure energy, instead of resulting from a massive object?
general-relativity energy visible-light spacetime curvature
edited 19 hours ago
Qmechanic♦
101k121831150
asked 20 hours ago
James
92
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add a comment |
If energy warps spacetime, then does light warp spacetime?
And if special relativity says that things near the speed of light increase in relativistic mass, then does light have a relativistic mass?
Also, if energy warps spacetime then is it possible to have a black hole form from pure energy, instead of resulting from a massive object?
general-relativity energy visible-light spacetime curvature
edited 19 hours ago
Qmechanic♦
101k121831150
asked 20 hours ago
James
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago
add a comment |
If energy warps spacetime, then does light warp spacetime?
And if special relativity says that things near the speed of light increase in relativistic mass, then does light have a relativistic mass?
Also, if energy warps spacetime then is it possible to have a black hole form from pure energy, instead of resulting from a massive object?
general-relativity energy visible-light spacetime curvature
edited 19 hours ago
Qmechanic♦
101k121831150
asked 20 hours ago
James
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If energy warps spacetime, then does light warp spacetime?
And if special relativity says that things near the speed of light increase in relativistic mass, then does light have a relativistic mass?
Also, if energy warps spacetime then is it possible to have a black hole form from pure energy, instead of resulting from a massive object?
general-relativity energy visible-light spacetime curvature
general-relativity energy visible-light spacetime curvature
edited 19 hours ago
Qmechanic♦
101k121831150
asked 20 hours ago
James
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 19 hours ago
Qmechanic♦
101k121831150
asked 20 hours ago
James
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 19 hours ago
Qmechanic♦
101k121831150
edited 19 hours ago
Qmechanic♦
101k121831150
edited 19 hours ago
Qmechanic♦
101k121831150
101k121831150
asked 20 hours ago
James
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 20 hours ago
James
92
asked 20 hours ago
James
92
92
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
James is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago
add a comment |
2
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago
2
2
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago
add a comment |
1 Answer
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Spacetime curvature is caused by the density and flow of energy and momentum. Light has all of these things, and so it causes a slight amount of spacetime curvature.
A photon of light with frequency $f$ has energy $E=hf$ where $h$ is Planck’s constant, so it can be defined to have a relativistic mass $E/c^2=hf/c^2$. But the whole concept of relativistic mass has become obsolete because it is confusing and accomplishes nothing. (Whenever you think “relativistic mass”, just think “energy” instead. They are proportional, and physicists often use units in which the proportionality constant is 1, so having these two concepts is pointless.) You should think of “mass” as the Lorentz-invariant mass, which for a photon is zero.
In principle, a sufficiently dense cloud of self-gravitating photons could collapse to form a black hole. There is no reason to believe that such photon clouds have ever existed in the universe. The black holes they would create would be the same as the black holes created by matter.
answered 20 hours ago
G. Smith
4,368919
add a comment |
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Spacetime curvature is caused by the density and flow of energy and momentum. Light has all of these things, and so it causes a slight amount of spacetime curvature.
A photon of light with frequency $f$ has energy $E=hf$ where $h$ is Planck’s constant, so it can be defined to have a relativistic mass $E/c^2=hf/c^2$. But the whole concept of relativistic mass has become obsolete because it is confusing and accomplishes nothing. (Whenever you think “relativistic mass”, just think “energy” instead. They are proportional, and physicists often use units in which the proportionality constant is 1, so having these two concepts is pointless.) You should think of “mass” as the Lorentz-invariant mass, which for a photon is zero.
In principle, a sufficiently dense cloud of self-gravitating photons could collapse to form a black hole. There is no reason to believe that such photon clouds have ever existed in the universe. The black holes they would create would be the same as the black holes created by matter.
answered 20 hours ago
G. Smith
4,368919
add a comment |
Spacetime curvature is caused by the density and flow of energy and momentum. Light has all of these things, and so it causes a slight amount of spacetime curvature.
A photon of light with frequency $f$ has energy $E=hf$ where $h$ is Planck’s constant, so it can be defined to have a relativistic mass $E/c^2=hf/c^2$. But the whole concept of relativistic mass has become obsolete because it is confusing and accomplishes nothing. (Whenever you think “relativistic mass”, just think “energy” instead. They are proportional, and physicists often use units in which the proportionality constant is 1, so having these two concepts is pointless.) You should think of “mass” as the Lorentz-invariant mass, which for a photon is zero.
In principle, a sufficiently dense cloud of self-gravitating photons could collapse to form a black hole. There is no reason to believe that such photon clouds have ever existed in the universe. The black holes they would create would be the same as the black holes created by matter.
answered 20 hours ago
G. Smith
4,368919
add a comment |
Spacetime curvature is caused by the density and flow of energy and momentum. Light has all of these things, and so it causes a slight amount of spacetime curvature.
A photon of light with frequency $f$ has energy $E=hf$ where $h$ is Planck’s constant, so it can be defined to have a relativistic mass $E/c^2=hf/c^2$. But the whole concept of relativistic mass has become obsolete because it is confusing and accomplishes nothing. (Whenever you think “relativistic mass”, just think “energy” instead. They are proportional, and physicists often use units in which the proportionality constant is 1, so having these two concepts is pointless.) You should think of “mass” as the Lorentz-invariant mass, which for a photon is zero.
In principle, a sufficiently dense cloud of self-gravitating photons could collapse to form a black hole. There is no reason to believe that such photon clouds have ever existed in the universe. The black holes they would create would be the same as the black holes created by matter.
answered 20 hours ago
G. Smith
4,368919
Spacetime curvature is caused by the density and flow of energy and momentum. Light has all of these things, and so it causes a slight amount of spacetime curvature.
A photon of light with frequency $f$ has energy $E=hf$ where $h$ is Planck’s constant, so it can be defined to have a relativistic mass $E/c^2=hf/c^2$. But the whole concept of relativistic mass has become obsolete because it is confusing and accomplishes nothing. (Whenever you think “relativistic mass”, just think “energy” instead. They are proportional, and physicists often use units in which the proportionality constant is 1, so having these two concepts is pointless.) You should think of “mass” as the Lorentz-invariant mass, which for a photon is zero.
In principle, a sufficiently dense cloud of self-gravitating photons could collapse to form a black hole. There is no reason to believe that such photon clouds have ever existed in the universe. The black holes they would create would be the same as the black holes created by matter.
answered 20 hours ago
G. Smith
4,368919
edited 20 hours ago
answered 20 hours ago
G. Smith
4,368919
answered 20 hours ago
G. Smith
4,368919
answered 20 hours ago
G. Smith
4,368919
4,368919
add a comment |
add a comment |
James is a new contributor. Be nice, and check out our Code of Conduct.
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2
Consider to only ask one subquestion per post. Possible duplicate of subquestion 1: physics.stackexchange.com/q/22876/2451 . Possible duplicate of subquestion 3: physics.stackexchange.com/q/355890/2451 .
– Qmechanic♦
19 hours ago