Photons Trapped for Record Time
In 1927, Albert Einstein conceived of a box in which light was trapped and a single light particle, or photon, was released in a theoretical experiment to measure the relationship between mass and energy.
Eighty years on, French physicists say they have created Einstein's box: a device just 1.1 inches big that snares a photon, enabling it to be monitored from birth to death.
Photons are arguably the ultimate existential particle in physics. By switching on a light bulb, you release a million billion photons every second.
But as soon...
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