as it approaches a black hole? Does the speed remain constant? Nothing escapes a black hole, not even light. So does the gravitational pull of a black hole on light speed it up? Can a black hole slow down the speed of light and reverse it's direction if the light travels past the black hole but then gets caught in it's pull?

__________________
Yahoo! Answers

light travels at same speed. just that the space is bent in such a way that moving ahead in time is equivalent to moving into the black hole. there is no other choice. Bending of space ime is commonly perceived as gravitation.

__________________
Yahoo! Answers

well if light went faster then it's own speed which is supposeably impossiable, it is in theory suppose to completely stop, meaning that all time would freeze for that particular object moving faster than the speeed up light, good question, and i really dont know the answer, but maybe the light moves at a constant speed, but idk

__________________
Yahoo! Answers

As the light approaches a black hole, it get's caught by it, getting trapped by the singularity, a point of zero volume and infinite mass and density. According to Newton's laws, the light will need an infinite effort to escape, effort that isn't reached by the light's capabilities. So the light remains in that single point called singularity.

__________________
Yahoo! Answers

think of a car traveling past you beeping it's horn, the horn sounds high pitched when it approaches you and low pitched when it moves away, this is because the speed of sound is constant in air, if you try to throw sound you essentially squash it like a spring which shortens it's wavelength so it will sound higher pitched.the speed of light is constant in vacuum just like sound in air, when the gravity of the black hole tries to accelerate it, instead of getting faster it's wavelength will get shorter so the light will get bluer, turn into UV then X-ray then gamma ray and it's wavelength will just keep getting shorter and shorter until it hits the center.This is called the 'doppler effect' and it occurs whenever you try to accelerate a wave.the end.

__________________
Yahoo! Answers