query: Photons & Space
positive_passages.docid: 10526
positive_passages.text: Why is the sky dark at night?
negative_passages.docid: 146268
negative_passages.text: Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
negative_passages.docid: 141866
negative_passages.text: The lightest photon ever detected
negative_passages.docid: 50575
negative_passages.text: Collisions in space/vacuum
negative_passages.docid: 93865
negative_passages.text: Where does the photon orbital angular momentum go in light-matter interactions?
negative_passages.docid: 13251
negative_passages.text: Does a photon in vacuum have a rest frame?
negative_passages.docid: 60149
negative_passages.text: Can photons be detected without being absorbed?
negative_passages.docid: 31156
negative_passages.text: Is light amplitude spatial?
negative_passages.docid: 27803
negative_passages.text: Why are photoelectrons emitted in the direction of incident photons?
negative_passages.docid: 99735
negative_passages.text: Are there any theoretical limits on the energy of a photon?
negative_passages.docid: 88401
negative_passages.text: How is the amplitude of light related to number of photons?
negative_passages.docid: 100599
negative_passages.text: What is the trajectory of a photon moving through a vacuum?
negative_passages.docid: 26670
negative_passages.text: Explain how (or if) a box full of photons would weigh more due to massless photons
negative_passages.docid: 126730
negative_passages.text: What is the mass of Photon or Light Particle?
negative_passages.docid: 146562
negative_passages.text: What happens when a photon hits a beamsplitter?
negative_passages.docid: 12267
negative_passages.text: (Almost) double light speed
negative_passages.docid: 95125
negative_passages.text: Rest mass of the photon