query: Why does photon emit a frequency when its rest mass is zero?
positive_passages.docid: 62867
positive_passages.text: Is $E^2=(mc^2)^2+(pc)^2$ correct, or is $E=mc^2$ the correct one?
negative_passages.docid: 41041
negative_passages.text: Does a photon instantaneously gain $c$ speed when emitted from an electron?
negative_passages.docid: 87598
negative_passages.text: Can we define the effective mass or the moving mass of a photon?
negative_passages.docid: 30745
negative_passages.text: Why can't photons have a mass?
negative_passages.docid: 8077
negative_passages.text: Photons in expanding space: how is energy conserved?
negative_passages.docid: 100807
negative_passages.text: Are the Maxwell equations a correct description of the wave character of photons?
negative_passages.docid: 86156
negative_passages.text: Do photons have a duration?
negative_passages.docid: 41466
negative_passages.text: Can the photoelectric effect be explained without photons?
negative_passages.docid: 55085
negative_passages.text: How come a photon acts like it has mass in a superconducting field?
negative_passages.docid: 20037
negative_passages.text: Do photons have acceleration?
negative_passages.docid: 13563
negative_passages.text: What really causes light/photons to appear slower in media?
negative_passages.docid: 57260
negative_passages.text: Photoelectric Effect - Dependence of current on frequency
negative_passages.docid: 136779
negative_passages.text: Does an classical charge that is stationary in a gravitational field radiate?
negative_passages.docid: 100599
negative_passages.text: What is the trajectory of a photon moving through a vacuum?
negative_passages.docid: 84440
negative_passages.text: Is (rest) mass quantized?
negative_passages.docid: 114143
negative_passages.text: Resonance Frequency and Centre of Gravity
negative_passages.docid: 149033
negative_passages.text: photon electron interaction such that the photon energy does not correspond to any state change