This provides a means of switching a signal between two wavelengths a neat trick for using bandwidth more effectively.

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That done, he fired light beams of two different wavelengths down the fibre.

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At times, the two men seemed to be talking on different wavelengths, picking entire lines from the many speeches they have been delivering at campaign rallies across the country rather than responding to each other.

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Confusingly, this gene can exist in two forms, which produce opsins sensitive to different wavelengths.

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By shining laser light onto hydrogen or antihydrogen and observing which wavelengths are absorbed, the energy levels of the two can be compared in detail.

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You really have to study these objects at all the different wavelengths of light to understand them so when you combine the two the whole picture is tremendously exciting.

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