Telecom

Laser communications: Empowering more data than ever before

Launching this summer, NASA's Laser Communications Relay Demonstration (LCRD) will showcase the dynamic powers of laser communications technologies. With NASA's ever-increasing human and robotic presence in space, missions ...

Energy & Green Tech

Invention lets rotting veggies make a greener world

For generations, kids have been coaxed into finishing their vegetables after their parents sternly advised them that it is not nice to waste food when people are starving elsewhere in the world. But someday soon, kids may ...

Robotics

Researchers developing fully autonomous robot chef

Imagine having your own digital personal chef; ready to cook up whatever you want; able to tailor the shape, texture, and flavor just for you; and it's all at the push of a button. Columbia engineers have been working on ...

Energy & Green Tech

Oxygen breathes new life into solar cell research

Scientists in Australia and the United States have been able to 'upconvert' low energy light into high energy light, which can be captured by solar cells, in a new way, with oxygen the surprise secret ingredient. The results ...

Electronics & Semiconductors

Passive radiative cooling can now be controlled electrically

Energy-efficient ways of cooling buildings and vehicles will be required in a changing climate. Researchers at Linköping University have now shown that electrical tuning of passive radiative cooling can be used to control ...

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Infrared

Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).

Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.

This text uses material from Wikipedia, licensed under CC BY-SA