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Gravitational Lensing Theory --
Light rays "bend" when they pass through a transparent material because they travel a bit slower inside the material. Is there any other way to "bend" light rays?
Yes! Gravity can alter the path of light rays, too. A black hole, after all, is simply an object with a gravitational field so strong that even photons are unable to escape from its vicinity. Any light ray which attempts to fly outwards from a black hole is stopped, and turned back into the black hole. That's an extreme case of "bending."
But there are more modest situations, in which the photon isn't stopped dead, but merely nudged a bit so that its direction (and energy) change slightly. For example, if we place a very massive object near the path of an incoming light ray:
The angle theta by which the light ray is deflected depends on two factors: its closest approach to the massive object (called the impact parameter, and denoted by b in the diagram), and the mass of the lensing object, M. As you might guess, it takes both a very massive lens, and a very close approach, to cause any significant deflection.
If an intervening mass lines up perfectly with a background source, it can bend the light from the source which would otherwise go far above us to come to us; and bend the light which would otherwise go far below us to come to us.
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What theory did Einsteins theory of relativity replace?
Speed of light is constant, not the other things.
Who is theory showed that gravity affects light?
Albert einstein
What do gravitational waves do?
They maintain gravity as light waves maintain light. They travel at the same speed (300,000,000 meters per second) as light. The difference is that the quantum of gravity, called the graviton, while it exists in theory, has never yet been detected.
What is a gravity light?
I don't think there is a scientific concept called "gravity light". There is gravity, and there is light. The two are not directly related.
How can we know that people traveling at or close to the speed of light will not age as fast as someone not traveling at such speeds when we have no means of reaching such speeds?
Einsteins theory of relativity
What is the speed that gravity travels?
Gravity is believed to travel at the speed of light. This follows from theory, especially the Special and the General Theory of Relativity; I believe there is not yet enough experimental evidence to confirm this speed.
Does gravity affect light?
Yes as explained in the theory of relativity Yes. Light is affected by gravity, but because light travels so fast, the effect is not noticeable under most conditions. As light passes by something with mass its path bends toward the object in what is called gravitational lensing. We have observed this effect around massive galaxies as the light from galaxies behind them is distorted.
Which theory compares light movement to dropping a pebble into a pond?
The theory of comparing light movement to dropping a pebble into a pond is called light refraction.
What are the features of gravity light?
Please clarify what you mean by "gravity light". I am not aware of any physical concept commonly called by that name.
What effects Einstein's General Theory of Relativity predicts that gravity has on light?
If light passes by a large mass gravity will pull it down a little, bending its trajectory. If light leaves a large mass gravity will "stretch" its wavelength (decrease its frequency)and if it falls into a large mass gravity will scruntch up its wavelength (increase its frequency).
An object so massive and dense that even light cannot escape its gravity is called what?
You are describing what we call a "black hole'. It was actually predicted in the theory of relativity. Formulated by Albert Einstein in 1905, the theory of relativity is the notion that the laws of physics are the same everywhere. The theory explains the behavior of objects in space and time, and it was used to predict everything from the existence of black holes, to light bending due to gravity, to the behavior of the planet Mercury in its orbit.
What three effects are predicted by Einsteins Special Theory of Relativity for observers who are moving at speeds near light speed?
Mass increases; time goes slower; distances (in the direction of movement) decrease.
