Diseases, Conditions, Syndromes

Lung model proves viability of spectroscopy technique

Take a nice, deep breath. Now imagine your lungs: Myriad airways like branches, each with tiny alveoli-like leaves. This alveolar structure is key to the absorption of oxygen and excretion of carbon dioxide that we call "breath." ...


Combining three techniques boosts brain-imaging precision

Researchers report that they have developed a method to combine three brain-imaging techniques to more precisely capture the timing and location of brain responses to a stimulus. Their study is the first to combine the three ...

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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.

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