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MIT physicists performed an idealized version of the double-slit experiment, stripping it to its quantum essentials. They ...
The word laser usually conjures up an image of a strongly concentrated and continuous light beam. Lasers that produce such light are, in fact, very common and useful.
In 1960, the "optical maser" — better known as the laser — was born. Not all lasers operate in the visible light spectrum, but they all use frequencies above microwave radiation.