Why is the photon regarded as a massless particle?
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Is there a "photon boundary"?
Started by GeezerBoard Physics, Astronomy & Cosmology |
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Will a photon clock run at a different rate from an atomic clock under gravity?
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Two low energy photons for one high energy photon in fluorescence possible?
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If gravity works on photon, does light has same speed toward and leave Earth?
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Can I exctract photon spin energy by using a spinnig black hole?
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