# Do photons feel gravity of approaching objects only?

I have read that photons while travelling near massive objects such as the sun experience gravitational pull which is why we see some stars at different positions than they are when seen towards the sun.

Now if photons felt gravity of objects they approach, speed of propagation of gravitational field can be both lesser than or equal to speed of light, but if photons that are receding from objects also feel it's gravity than certainly speed of propagation of gravity would be more than speed of light !

So the question is do photons feel gravity of object they move away from ? If they do is my assertion correct ?

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According to my basic knowledge, photon has zero rest mass. Newton's gravitational law involves rest mass, I hope. So, I think photon shouldn't feel any gravitational force. However, there might be solution w.r.t rlativistic mass as you are saying (in first two lines) they will feel force. – Vinaykumar Jan 19 '14 at 10:10
@VINAY : Have you read somewhere that newton's law involves rest mass ? Where ? – Rijul Gupta Jan 19 '14 at 10:13
possible duplicate of The speed of gravity? – Wojciech Morawiec Jan 25 '14 at 23:34

If you want to think of the gravitational field as an effect of gravitons travelling at $c$, you have to remember that the massive object doesn't come into existence as the photon passes it: the photon can feel the gravitational force "emitted" by the mass in the past. (I feel a little squicky talking about gravitational attraction as something that is "emitted.")