query: To what extent can speed of light be reduced?
positive_passages.docid: 142585
positive_passages.text: Is there a theoretical maximum for refractive index?
negative_passages.docid: 127383
negative_passages.text: Speed of light in general relativity
negative_passages.docid: 4005
negative_passages.text: If refraction slows down light, isn't it possible to hold light still?
negative_passages.docid: 45953
negative_passages.text: How can I explain the scientific basis of the constant speed of light to a $c$-decay proponent?
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: 111892
negative_passages.text: Cancelling special & general relativistic effects
negative_passages.docid: 14036
negative_passages.text: What is so special about speed of light in vacuum?
negative_passages.docid: 33110
negative_passages.text: The origin of the value of speed of light in vacuum
negative_passages.docid: 37345
negative_passages.text: Why can't massless particle exceed speed of light?
negative_passages.docid: 155345
negative_passages.text: Can we use curved spacetime to measure the one-way speed of light?
negative_passages.docid: 112714
negative_passages.text: How do i slow down physics?
negative_passages.docid: 109786
negative_passages.text: Can a human size object move so fast that it ceases to be observable?
negative_passages.docid: 10781
negative_passages.text: Accelerating particles to speeds infinitesimally close to the speed 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: 21144
negative_passages.text: Can gravity accelerate an object past the speed of light?
negative_passages.docid: 16748
negative_passages.text: What happens if light/particles exceeded the speed of light for a particular medium?
negative_passages.docid: 8946
negative_passages.text: Does the wavelength always decrease in a medium?