Current Blu-ray lasers emit light in the blue part of the electromagnetic spectrum (about 405 nm wavelength).
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The Chinese concur that the contest for the electromagnetic spectrum to gain battlefield initiative is a crucial phase of warfare.
New uses of the electromagnetic spectrum have given rise to everything from cell phones to phased array radars to satellite radio.
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These tools span much of the electromagnetic spectrum from X-rays to ultraviolet to the infrared - and of course microscopy with visible light.
The ideal solution would be to enact spectrum reform that frees up larger swaths of the electromagnetic spectrum to be allocated by market forces.
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Thus the key insight of the telecosm is that in an information age information and value will migrate to the perfect sine waves of the electromagnetic spectrum.
But thanks to mismanagement by the FCC, only a small slice of the electromagnetic spectrum is available for the flexible, exclusive licenses needed to provide cell phone service.
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The new work focuses instead on cold, dense masses of gas that have markedly less random motion, and which emit their radiation in the microwave part of the electromagnetic spectrum.
As this brief exercise in industrial archeology illustrates, the same physical features that unify the electromagnetic spectrum also make it relatively easy to combine diverse electronics businesses in the same enterprise.
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Metamaterials are proving to be quite useful for toying with the electromagnetic spectrum, whether for technology previously thought to be the stuff of science fiction, or for boring real-world applications.
It begins with a history of the science and the growing realisation that the information-bearing power of the electromagnetic spectrum the range of frequencies and wavelengths available to carry signals is without practical limit.
The Nicmos sees even farther than the ACS - to the most distant galaxies yet recorded - because the expanding Universe has stretched their light into the near-infrared portion of the electromagnetic spectrum.
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It arises from light waves in the visible band of the electromagnetic spectrum, the segment with wavelengths of 400 billionths of a metre at the blue end to 700 billionths at the red.
So Gilder took to the quadrangle once more and read another ten dozen books, this time on light and the electromagnetic spectrum, until he could pass for the ghost of Richard Feynman, sans bongo drums.
Matter falling into them swirls around, and atoms rub together generating heat "like spinning a stick against another piece of wood to start a fire" and producing enough heat to make the material radiate across the electromagnetic spectrum.
Blazars are a special case of "active galaxies" - those whose supermassive black holes spray out great quantities of light across the whole electromagnetic spectrum as they feed on surrounding matter.
The concept may be easily expandable to other parts of electromagnetic waves spectrum.
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