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I found an answer from www.scientificamerican.com

If Photons Have Zero Mass, How Can Black Holes Pull Them In ...


Apr 3, 2013 ... "If photon has rest mass = 0 , then why does black hole pull it in? ... velocity accelerates into the black hole because of stronger and stronger gravity. But how about light? The speed of light is the limit, so what happens then?


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I found an answer from physics.stackexchange.com

mass - How is light affected by gravity? - Physics Stack Exchange


While light doesn't have rest-mass, it still has energy --- and is thus affected by gravity. If you think of gravity as a distortion in space-time (a la ...


For more information, see mass - How is light affected by gravity? - Physics Stack Exchange

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I found an answer from www.quora.com

If light has no mass, why is it affected by gravity? - Quora


Photons have no "invariant mass"; that is, mass that is not a component of their kinetic term in the field equation. This kinetic term, however, gives them energy, ...


For more information, see If light has no mass, why is it affected by gravity? - Quora

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I found an answer from www.quora.com

How does gravity affect light? - Quora


Gravity affects objects which have some mass but light particles do not have any mass so gravity cannot affect ... If light has no mass, why is it affected by gravity?


For more information, see How does gravity affect light? - Quora

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I found an answer from helios.gsfc.nasa.gov

NASA's Cosmicopia -- Ask Us - Space Physics - Gravity in Space


Jun 14, 2012 ... What Would Happen to Earth if Gravity Stopped Working? ... Is Light Affected By Gravity? Gravity and the Speed of Light ... So, even if you could instananeously change the mass of the Sun, there would be an 8 minute ... If you are free-floating in the middle of space with no gravitational forces nearby, is it ...


For more information, see NASA's Cosmicopia -- Ask Us - Space Physics - Gravity in Space

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I found an answer from helios.gsfc.nasa.gov

NASA's Cosmicopia -- Ask Us - General Physics - Speed of Light


Dec 22, 2006 ... How do we know that light travels at this speed? And how can something be affected by gravity if it has no mass, as with light? If something has ...


For more information, see NASA's Cosmicopia -- Ask Us - General Physics - Speed of Light

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I found an answer from en.wikipedia.org

Massless particle - Wikipedia


In particle physics, a massless particle is an elementary particle whose invariant mass is zero. ... For example, these particles must always move at the speed of light. In this ... they do have relativistic mass, which is what acts as the gravity charge. ... The component of force parallel to the motion still affects the particle, but by ...


For more information, see Massless particle - Wikipedia

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I found an answer from astronomy.stackexchange.com

general relativity - If light has no mass, why is it affected by gravity ...


Jan 11, 2019 ... Another way to answer this question is to apply the Equivalence Principle, which Einstein called his "happiest thought" (so you know it has to be ...


For more information, see general relativity - If light has no mass, why is it affected by gravity ...

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I found an answer from physics.stackexchange.com

Why is light affected by gravity even though it is massless? - Physics ...


Also, notice the equation E=mc2 is only a special case of the ... Now, for photons/ light they have zero rest mass(m=0) but they do have a value ...


For more information, see Why is light affected by gravity even though it is massless? - Physics ...

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I found an answer from www.reddit.com

If light has no mass how is it affected by gravity? : askscience


The source of gravity isn't just mass, it's the stress-energy tensor, which contains things like energy and momentum in addition to mass.


For more information, see If light has no mass how is it affected by gravity? : askscience

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I found an answer from en.wikipedia.org

Negative mass - Wikipedia


In theoretical physics, negative mass is matter whose mass is of opposite sign to the mass of ... Ever since Newton first formulated his theory of gravity, there have been at least three ... Although no particles are known to have negative mass, physicists (primarily Hermann ..... See also: Exotic matter and Faster-than-light.


For more information, see Negative mass - Wikipedia

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I found an answer from www.scientificamerican.com

If there is no gravity in space, why do "shooting stars" fall?


Gravity can be thought of as a side effect of matter, because any object that has ... due to gravity, G is Newton's gravitational constant, m1 is the mass of one object, ... of sand has been converted into heat, a visible streak of light and atom-size ...


For more information, see If there is no gravity in space, why do "shooting stars" fall?

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I found an answer from imagine.gsfc.nasa.gov

Ask an Astrophysicist: Relativity


Mar 8, 2017 ... Why is it not possible to travel at the speed of light? (Submitted May .... If photons have no mass, how are they affected by gravity? (Submitted ...


For more information, see Ask an Astrophysicist: Relativity