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Escaping Photon Used to Challenge Energy-Time Uncertainty

Einstein argued that measuring the mass loss of a timed photon box could in principle determine both the photon's energy and its emission time more precisely than quantum uncertainty allowed.

Albert Einstein in his Berlin office around 1920
Albert Einstein in his Berlin office, about 1920. Unknown photographer — public domain. Wikimedia Commons source.
Read the explainer →Year 1930BrusselsPhysics

Escaping Photon Used to Challenge Energy-Time Uncertainty

1930 · Brussels · Belgium · Physics

Einstein argued that measuring the mass loss of a timed photon box could in principle determine both the photon's energy and its emission time more precisely than quantum uncertainty allowed.

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