query: Can a frame of reference travel with the speed of light?
positive_passages.docid: 13251
positive_passages.text: Does a photon in vacuum have a rest frame?
negative_passages.docid: 119639
negative_passages.text: Do photons bend spacetime or not?
negative_passages.docid: 106814
negative_passages.text: What happens if a super fast rotating ball accelerates near speed of light?
negative_passages.docid: 91265
negative_passages.text: Has the speed of light changed over time?
negative_passages.docid: 37345
negative_passages.text: Why can't massless particle exceed speed of light?
negative_passages.docid: 120679
negative_passages.text: Rømer's determination of the speed of light
negative_passages.docid: 127383
negative_passages.text: Speed of light in general relativity
negative_passages.docid: 56930
negative_passages.text: What would an observer see if he/she flew toward a clock at relativistic speeds?
negative_passages.docid: 9016
negative_passages.text: How can time dilation be symmetric?
negative_passages.docid: 1674
negative_passages.text: If the speed of light is constant, why can't it escape a black hole?
negative_passages.docid: 15685
negative_passages.text: Does slowing light violate relativity?
negative_passages.docid: 96657
negative_passages.text: The speed of light as it approaches a massive body
negative_passages.docid: 57773
negative_passages.text: About the speed of light and gravity
negative_passages.docid: 39399
negative_passages.text: Will free-fall object into black hole exceed speed of light $c$ before hitting black hole surface?
negative_passages.docid: 12597
negative_passages.text: Does the speed of medium affect the path of light?
negative_passages.docid: 4350
negative_passages.text: Rotate a long bar in space and get close to (or even beyond) the speed of light $c$
negative_passages.docid: 28577
negative_passages.text: Hole-and-nail paradox in special relativity