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hvirgen
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I know light is affected by gravity, but does light have its own gravitational pull? Does light attract other light?
That is not quite true. Although the spacetime is curved around, say, a star it is not curved spacetime that is the cause. For example; a beam of light is deflected by the sun due to the gravitational attraction on the light. The amount of delfection is determined by that acceleration and the amount of spatial contraction caused by the mass of the sun.spidey said:Light has no gravitational field around it..light is bent because space-time is curved as per GR...
Its pretty simple. Eintein never said that gravity was a curvature in spacetime. Actually he stated quite clearly that he disagreed with such an interpretation. The assumption that he said so is probably the worst misconception in all of physics. Consider Einstein's equivalence principle (weak form)spidey said:i don't understand uniform gravitational field and curvature is zero...how can a curvature be zero in uniform gravitational field...
If the spacetime is flat then it is impossible to introduce spacetime curvature by changing the spacetime coordinate from that of an inertial frame in a flat spacetime to coordinates corresponding to a uniformly accelerating frame of reference.A uniform gravitational field is equivalent to a uniformly accelerating frame of reference in flat spacetime.
The Christoffel symbols for an observer in a uniform gravitational field are non-zero. For this reason particles, as well as light, are deflected.One can always find in any given locality in which all local "gravitational fields" (all Christofell symbols: all [itex]\Gamma^{\alpha}_{\mu\nu}[/itex]) disappear. No [itex]\Gamma[/itex] means no "gravitational field" ...
Yes, light does have gravity. According to Einstein's theory of general relativity, all forms of energy, including light, have a gravitational pull.
Light exerts a gravitational force because it has mass and energy. Even though photons, the particles that make up light, have no mass, they still have energy and momentum, which can create a gravitational pull.
The gravitational force of light is very small compared to other objects with mass, such as planets or stars. However, it can still have an effect on very large scales, such as in the bending of light around massive objects like black holes.
Yes, light can be affected by gravity. In fact, the bending of light due to gravity was one of the first pieces of evidence for Einstein's theory of general relativity.
No, light cannot escape from a black hole. The gravitational pull of a black hole is so strong that even light cannot travel fast enough to escape it, which is why they are called "black" holes.