query: Is there any relationship to light and gravity since both propagate at the same speed in a vacuum?
positive_passages.docid: 77372
positive_passages.text: "Speed" of Gravity and Speed of Light
negative_passages.docid: 8865
negative_passages.text: Could gravity accelerate light?
negative_passages.docid: 81880
negative_passages.text: How can a photon have no mass and still travel at the speed of light?
negative_passages.docid: 81663
negative_passages.text: Why does gravity travel at the speed of light?
negative_passages.docid: 105142
negative_passages.text: What does general relativity say about the relative velocities of objects that are far away from one another?
negative_passages.docid: 38673
negative_passages.text: General relativity: For massless particles, is the momentum and velocity 4-vectors equal?
negative_passages.docid: 120621
negative_passages.text: Speed of Dark experiment, does it *really* travel faster than light?
negative_passages.docid: 19850
negative_passages.text: Why is the speed of light defined as 299792458 m/s?
negative_passages.docid: 50289
negative_passages.text: The vacuum light speed: Is it really constant, i.e., independent of location in space-time?
negative_passages.docid: 33110
negative_passages.text: The origin of the value of speed of light in vacuum
negative_passages.docid: 14186
negative_passages.text: Is it possible for information to be transmitted faster than light by using a rigid pole?
negative_passages.docid: 86328
negative_passages.text: What is the relative speed of two near-light speed particles headed towards each other?
negative_passages.docid: 117653
negative_passages.text: How does light travel?
negative_passages.docid: 12267
negative_passages.text: (Almost) double light speed
negative_passages.docid: 3785
negative_passages.text: What is the relation between electromagnetic wave and photon?
negative_passages.docid: 15685
negative_passages.text: Does slowing light violate relativity?
negative_passages.docid: 8077
negative_passages.text: Photons in expanding space: how is energy conserved?