Energy spacetime warping
Clash Royale CLAN TAG#URR8PPP
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
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
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♦
Dec 30 '18 at 22:26
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
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 Dec 30 '18 at 22:22
Qmechanic♦
102k121831163
102k121831163
asked Dec 30 '18 at 20:48
JamesJames
116
116
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♦
Dec 30 '18 at 22:26
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♦
Dec 30 '18 at 22:26
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♦
Dec 30 '18 at 22:26
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♦
Dec 30 '18 at 22:26
add a comment |
1 Answer
1
active
oldest
votes
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.
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
return StackExchange.using("mathjaxEditing", function ()
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
);
);
, "mathjax-editing");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "151"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fphysics.stackexchange.com%2fquestions%2f451260%2fenergy-spacetime-warping%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
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.
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.
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.
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.
edited Dec 30 '18 at 21:17
answered Dec 30 '18 at 20:59
G. SmithG. Smith
5,1241021
5,1241021
add a comment |
add a comment |
Thanks for contributing an answer to Physics Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fphysics.stackexchange.com%2fquestions%2f451260%2fenergy-spacetime-warping%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
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♦
Dec 30 '18 at 22:26