What is the slowest thing on Earth?

Physicists can use bright, hot lasers to slow atoms down so much that they measure -459 degrees Fahrenheit.

Katie McCormick, Postdoctoral Scholar of Physics, University of Washington • conversation
June 22, 2020 ~6 min

Tags: physics quantum-mechanics laser light photons molecules curious-kids curious-kids-us temperature cold atoms absolute-zero warmblood sloths

Pairing lasers with microwaves makes mind-bogglingly accurate electronic clocks – a potential boon for GPS, cell phones and radar

Researchers have made some of the most accurate clocks imaginable in recent years, but the trick is harnessing those clocks to electronics. Using lasers to tune microwaves bridges the gap.

Franklyn Quinlan, Physicist, National Institute of Standards and Technology • conversation
May 22, 2020 ~7 min

Tags: physics astronomy dark-matter gravity laser gps cell-phones microwave black-holes metrology radar power-grid atomic-clocks frequency

New laser hits mark on cancer imaging to airport security

Harvard researchers have developed a totally new type of laser that can reach terahertz frequencies offering short-range, high-bandwidth wireless communications, very-high-resolution radar, and spectroscopy.

Leah Burrows • harvard
Nov. 15, 2019 ~7 min

Tags:  science-technology  engineering  physics  electromagnetic-spectrum  federico-capasso  laser  terahertz-frequencies  tunable-terahertz-laser

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