query: How does a shadow appear to break the speed of light?
positive_passages.docid: 25121
positive_passages.text: Is it really possible to break the speed of light by flicking your wrist with a laser pointer?
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: 13563
negative_passages.text: What really causes light/photons to appear slower in media?
negative_passages.docid: 65533
negative_passages.text: Does gravity slow the speed that light travels?
negative_passages.docid: 152064
negative_passages.text: Why does change in speed of a wave make it refract?
negative_passages.docid: 7618
negative_passages.text: What is the speed of light relative to?
negative_passages.docid: 119639
negative_passages.text: Do photons bend spacetime or not?
negative_passages.docid: 974
negative_passages.text: Speed of light in a gravitational field?
negative_passages.docid: 37941
negative_passages.text: Can light travel slower than the maximum?
negative_passages.docid: 91265
negative_passages.text: Has the speed of light changed over time?
negative_passages.docid: 24863
negative_passages.text: How can gravity affect light?
negative_passages.docid: 143038
negative_passages.text: As light from a star spreads out and weakens, do gaps form between the photons?
negative_passages.docid: 112965
negative_passages.text: Are virtual particles limited by the speed of light?
negative_passages.docid: 22402
negative_passages.text: If I am travelling on a car at around 60 km/h, and I shine a light, does that mean that the light is travelling faster than the speed of light?
negative_passages.docid: 139098
negative_passages.text: Can the Flash run faster than light?
negative_passages.docid: 62039
negative_passages.text: What does a sphere moving close to the speed of light look like?
negative_passages.docid: 16748
negative_passages.text: What happens if light/particles exceeded the speed of light for a particular medium?