Can Photons from a Laser Distort Space-Time Like Massive Objects?

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Discussion Overview

The discussion centers around the question of whether photons, particularly in the form of a laser, can distort the curvature of space-time similarly to massive objects. Participants explore the implications of energy in General Relativity and the potential for measuring such distortions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions if massless photons can distort space-time like massive objects, suggesting that energy is the key factor in General Relativity.
  • Another participant agrees that photons can cause space-time distortion due to their energy, referencing the stress-energy tensor as the source of gravity.
  • A participant introduces a hypothetical scenario involving traveling at near-light speed, discussing how kinetic energy and relativistic mass might influence gravitational distortion.
  • One participant provides a reference to a scientific article for further reading on the topic.
  • A later reply expresses difficulty in understanding the mathematical aspects and seeks a way to calculate the equivalent mass of a laser based on its dimensions and energy output.

Areas of Agreement / Disagreement

Participants generally agree that energy plays a crucial role in gravitational effects, but there is no consensus on the specifics of how a laser's energy might be quantified or compared to mass. The discussion remains unresolved regarding the practical implications and calculations involved.

Contextual Notes

Participants express uncertainty about the mathematical formulations and the definitions of terms like "relativistic mass." There are also limitations in understanding how to apply theoretical concepts to practical measurements of laser-induced space-time distortion.

Teleros
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I know photons are massless, but is it possible at all for them in the form of say a laser to distort the curvature of space in the same way as an object with mass would? And if so is there any way to measure how much?

Many thanks in advance.
 
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Teleros said:
I know photons are massless, but is it possible at all for them in the form of say a laser to distort the curvature of space in the same way as an object with mass would?
Yes, because photons have energy. In General Relativity, the source of gravity (and space-time distortion) is not mass, but energy (really the stress-energy tensor).
 
Doc Al said:
Yes, because photons have energy. In General Relativity, the source of gravity (and space-time distortion) is not mass, but energy (really the stress-energy tensor).

Situation: i am traveling at 99,999...etc. speed of light and my mass is about 5000% my real mass. so, my gravitational distortion is 5000% more deeper than the stationary condition.

but, as you assume, it's energy that makes the grav field, but i have an incredible cinetic energy (K=1/2mv²/gamma), and the distortion that it produces should grow if i also consider the distortion of my mass (not rest mass...the other i don't know the name) so my grav field is more than i aspect or there is something strange in your quote?
 
:rolleyes: Probably should've put a disclaimer about my poor maths in the first post. That article went way over my head:-p ...

Ok now simple energy I can understand (E=MC^2 can do that), but whilst I can understand that working for a single photon, can it work for a laser? If not, what I need is something where you can input say the diameter and length of the laser (plus energy at the target) to work out its equivalent mass (if that makes any sense at all :-p ). Damn I wish I could do maths better :( .
 

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