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Thanks for answering guys, pleased to meet you! Hi Mathew, do you mean that, to your opinion, light is not bent by gravitation?
Hi Mathew, do you mean that, to your opinion, light is not bent by gravitation?
....you will see that the two light rays travel in the same direction once they start traveling nearby together at the sun's perimeter. Being independent from the body where they come from at this point in space and time, do you see any reason why they should experiment a different bending?
in my opinion, based on experimental evidence, gravity has no effect on electromagnetic waves
The light rays you show in your diagram would be affected differently because they spend different amounts of time in the gravity field.
However, in principle it is possible to imagine 2 rays that do end up parallel but there are some issues to consider. On the sun the effect is exceedingly small
if you use a neutron star as your example it is much easier to consider that your diagram would be correct
... Anybody thinks that the rays coming from the sun should also be curved by the gravitation of the sun?
One minor problem with this argument is that it assumes that a photon emitted near the limb of the solar disk could reliably reach the Earth. The light is emitted from the visible disk of the Sun because the temperature of the Sun is sufficiently high; but at these temperatures, the Sun's atmosphere is effectively opaque to visible light.
As an example, a neutron star would be more difficult to imagine than the sun, because it doesn't produce visible light and because it has no measurable diameter.
Quote from: Le RepteuxAs an example, a neutron star would be more difficult to imagine than the sun, because it doesn't produce visible light and because it has no measurable diameter.I think that this latter comment was referring to a black hole, rather than a neutron star.A neutron star has a definite surface, and a very compressed atmosphere (perhaps μm thick).They are very hot (at least initially), and will produce visible light as well as X-Rays.
Sun will appear very slightly bigger because of gravitational-lensing ...https://van.physics.illinois.edu/QA/listing.php?id=21717&t=gravitational-lensing-of-the-sun
Light refraction of plasma medium is a conventionally accepted physical phenomena...Example: http://journals.aps.org/pr/abstract/10.1103/PhysRev.162.117Or, is the San disobeying the low of refraction?
Light refraction of plasma medium is a conventionally accepted physical phenomena...
The way I understand it, gravitation from the sun during an eclipse is affecting the position of all the stars that we observe at that moment, which means that most of them appear far away from the sun's perimeter, so that their light doesn't have to go through the sun's atmosphere to be bent. If it is so, then refraction wouldn't affect those rays, so how would you explain their bending?
...the refractive index of a plasma is frequency dependent, but observations show the bending to be frequency independent.
Good observation Collin!
You mean that you observed a refraction phenomenon when the source was near the sun? That some of the frequencies vanished?