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News and Updates

Displaying 301 - 325 of 648

Noise, Temperature, and the New SI

NIST has recently made substantial improvements to its Johnson-noise thermometry system, which is playing a vital role in the worldwide effort to determine the

Counting Down to the New Ampere

After it's all over, your lights will be just as bright, and your refrigerator just as cold. But very soon the ampere -- the SI base unit of electrical current

Measuring Tiny Forces with Light

Photons are bizarre: They have no mass, but they do have momentum. And that allows researchers to do counterintuitive things with photons, such as using light

Detecting Brain Waves with Atomic Vapor

It's really hard to hear what the brain is saying. Neural impulses -- currents of ions moving through channels between the brain's 100 billion neurons at a

SF6 Shows Promise as Mercury Substitute

Elemental mercury – which is being phased out of commercial thermometers worldwide due to safety concerns – may also be replaced as a temperature reference