As photons reach a black hole and begin fall in - is their speed increased as they go down (like a vacuum cleaner does to dust).
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3Possible duplicates: http://physics.stackexchange.com/q/24319/2451 , http://physics.stackexchange.com/q/98980/2451 , and links therein. – Qmechanic Apr 02 '14 at 20:29
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Also, photons travel at the speed of light, thus their speeds cannot increase. – Kyle Kanos Apr 03 '14 at 00:52