On 8/30/2019 1:03 PM, Lawrence Crowell wrote:
Virtual particles are not directly detectable. It is odd however that an observer in an accelerated frame should in fact observe them. Accelerated motion transforms virtual particles into a black body spectrum of radiation with 1K for 10^{21}m/sec^2. This is Unruh radiation that is related to Hawking radiation from a black hole. A black hole has a set of Boulware vacua, where empty space in one is equivalent to another with radiation. This is odd, and a probe on an accelerated frame will record a temperature, even if another observer on an inertial frame witnesses no such radiation.
But the inertial observer can see the accelerated detector click and the accelerated thermometer rise in temperature.
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