So we see a virtuous complementarity: more, better spectrum will boost spectrum reuse efficiencies.

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Complementarity is far from intuitve, and many of the basic concepts of quantum mechanics are similarly hard to grapple with.

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This complementarity has been accompanied by a number of alliances of convenience, most notably in resisting pressure from the rich world to agree to fixed targets for limiting carbon emissions.

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During the next decade, Bohr worked with physics to lay the foundation of the principles of quantum mechanics, and it was in 1927 that he developed the concept of complementarity, a key principle in quantum mechanics.

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An employee who is bright enough to spot a complementarity may not be content with repairing kitchen appliances, so companies will find that some of the pressure to break down occupational barriers will come from the bottom up.

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