Most of the Zodiacs had come from the Farley, which was not yet in visible range.

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So all of the light produced by an LED is the same color, and LEDs can be designed to produce light in the visible range.

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Mayer found that both campaigns included identifying information about the user in page headers and URLS of pages, parts of the sites that are visible to a wide range of companies including Akamai, Amazon, Chartbeat, Comscore, Facebook and Google, among others.

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For one thing, the image colors have inexplicably shifted into the violet range of the visible spectrum.

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Overcoming its production mind-set, Ballarpur has lately become visible in the retail market with its new range of office stationery items.

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But crystal fibres push the range of single-mode wavelengths right into the visible part of the spectrum, opening up huge new tracts of wavelength for telecommunications.

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By measuring the way their fields reflect and emit energy at visible and infrared wavelengths, precision farmers can monitor a wide range of variables that affect their crops such as soil moisture, surface temperature, photosynthetic activity, and weed or pest infestations.

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Although it did not yet work with visible wavelengths of light, Mr Hunt said it could lead to a range of cheap, small, portable sensors that could find a role in many different fields.

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The more visible the future growth potential is, the easier it is to forecast within a reasonable range of accuracy.

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