query: What's the longest wavelength single photon we've ever observed?
positive_passages.docid: 141866
positive_passages.text: The lightest photon ever detected
negative_passages.docid: 112408
negative_passages.text: What is the theoretical limit for farthest we can see back in time and distance?
negative_passages.docid: 100807
negative_passages.text: Are the Maxwell equations a correct description of the wave character of photons?
negative_passages.docid: 71897
negative_passages.text: What is Size of Photon?
negative_passages.docid: 118021
negative_passages.text: How do you "store" a photon?
negative_passages.docid: 59176
negative_passages.text: Amplitude of an electromagnetic wave containing a single photon
negative_passages.docid: 37941
negative_passages.text: Can light travel slower than the maximum?
negative_passages.docid: 22538
negative_passages.text: Types of photon qubit encoding
negative_passages.docid: 31156
negative_passages.text: Is light amplitude spatial?
negative_passages.docid: 20412
negative_passages.text: Frequency of a photon
negative_passages.docid: 147220
negative_passages.text: How can the discrete atomic spectrum be observed?
negative_passages.docid: 75308
negative_passages.text: Does there exist a laser that is tunable over the whole visible spectrum?
negative_passages.docid: 74065
negative_passages.text: Proof of de Broglie wavelength for electron
negative_passages.docid: 134948
negative_passages.text: How coherent light is created for single slit experiment?
negative_passages.docid: 154151
negative_passages.text: How do single photons travel from here to there
negative_passages.docid: 85593
negative_passages.text: Is fluorescence from a single atom/ion visible with the naked eye (e.g. in a strongly coupled trap or cavity)
negative_passages.docid: 154825
negative_passages.text: What's the difference between low energy photons and high energy photons?