a massive body like a star creates a warped spacetime in its vicinty. this warped geometry of space is reflected by the geodesics appropriate to its mass. a photon passing by this massive object is not, as per GR, "attracted" to the star via some "force", but rather simply follows what it sees to be a "straight" line, while in reality that "straight" line is actually curved due to the mass of the star warping the surrounding space. ie, the photon is not accelerated due to a change in its apparent direction, since it thinks it is traveling in a straight line - it "feels" no force acting upon it. (i hope that is all correct...) if we start changing the energy of the passing photon, does this also change the geodesic which it follows past the star? ie, will a radio wavelength photon follow the same "straight" line as a gamma ray photon? i assume that if we replace "photon" in the question with "massive body" and consider the path of a body of small mass, such as an asteroid, compared to the path of a larger mass body such as a planet sized object, they will follow different paths because the mass of each will both be affecting the overall geodesics of the system. (correct?) since photons do not have "mass" do photons of different energy follow the same geodesic path, or does the energy of a photon also affect the overall warping of spacetime, such that different wavelngth photons follow different paths past the star? thanks.