query: How light travel in a vacuum or in an empty space?
positive_passages.docid: 14043
positive_passages.text: Why don't electromagnetic waves require a medium?
negative_passages.docid: 12597
negative_passages.text: Does the speed of medium affect the path of light?
negative_passages.docid: 22118
negative_passages.text: If all motion is relative, how does light have a finite speed?
negative_passages.docid: 98389
negative_passages.text: Electromagnetic waves in vacuum
negative_passages.docid: 12916
negative_passages.text: How does a photon experience space and time?
negative_passages.docid: 56005
negative_passages.text: Speed of light travel
negative_passages.docid: 119580
negative_passages.text: Does light actually travel through glass?
negative_passages.docid: 14036
negative_passages.text: What is so special about speed of light in vacuum?
negative_passages.docid: 13251
negative_passages.text: Does a photon in vacuum have a rest frame?
negative_passages.docid: 67575
negative_passages.text: Electromagnetic wave properties of light vs radio waves
negative_passages.docid: 91300
negative_passages.text: Does light loses its energy when it passes through denser medium?
negative_passages.docid: 126110
negative_passages.text: Do celestial objects experience drag from the near vacuum of space/does the near vacuum have a mean velocity?
negative_passages.docid: 34626
negative_passages.text: How does the propagation of gravity work for photons?
negative_passages.docid: 74101
negative_passages.text: How is a vacuum able to propagate light?
negative_passages.docid: 40148
negative_passages.text: Does light have mass?
negative_passages.docid: 150352
negative_passages.text: Why light moves sideways?
negative_passages.docid: 125019
negative_passages.text: What is thermal radiation? How does it move through space?