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... ite the ruby.
Since ruby is actually just corundum doped with chromium atoms, when ruby is stimulated, it emits a red light.
A hole is drilled in the surface of a mirrored ruby so that red light can escape from the hole, resulting in a fairly concentrated and thin column of red light that, when directed at a point, can reach a distance greater than the surface of the sun. high temperature.
Zhou Wenwen used a ruby, which was naturally Theodore Maiman's plan, and Zhou We ...
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