Light Bending on Single Point: What Happens?

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Discussion Overview

The discussion revolves around the behavior of light as it approaches a massive object, specifically considering a scenario where light from one star (star A) is directed towards the center of another star (star B). Participants explore whether the light would bend due to gravitational effects and what the implications of that might be, focusing on theoretical aspects of light bending and gravitational influence.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant posits that light passing near star B would bend due to its mass, questioning the direction of that bend if the light were to approach the center of star B.
  • Another participant suggests that if light were to travel directly through the center of star B, it would not bend at all due to rotational symmetry, although the wavelength might be affected by the gravitational field.
  • A different viewpoint asserts that if the light is aimed directly at the center of star B, it would simply be absorbed without bending.
  • Some participants engage in clarifying the implications of the initial questions regarding light bending and the conditions under which it might occur.

Areas of Agreement / Disagreement

Participants express differing views on whether light would bend when directed at the center of star B, with no consensus reached on the outcome of the light's behavior in this scenario.

Contextual Notes

The discussion includes assumptions about the gravitational effects on light and the conditions under which light might or might not bend, which remain unresolved.

Uzbar Zibil Tarag
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Say you have two stars, star A and star B, separated by a distance of x, and the light from star A went directly from A to B but was heading directly for the centre point of star B.
If the light passed near star B then due to the mass the will bend, yet if it was to pass through (or try to) the centre with all other forces consider negligible which direction would the light bend to? Or would it bend at all?
 
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Uzbar Zibil Tarag said:
which direction would the light bend to? Or would it bend at all?
The first question basically answers the second.
 
How?
The first part is asking if light will bend the second part is offering a second option that light might take in this situation.
 
If you send a light ray straight through a star then of course (by rotational symmetry) it can not bend in any direction. The wavelength of the light will of course be affected by the gravitational field but the direction will not.
 
Uzbar Zibil Tarag said:
the light from star A went directly from A to B but was heading directly for the centre point of star B.

If that is true then the light won't bend at all, it will just hit star B and be absorbed.
 

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