TED-Ed: What is the coldest thing in the world? - Lina Marieth Hoyos

The video explores the concept of extreme cold in physics labs, where temperatures are fractions above absolute zero. It explains how temperature relates to atomic motion and describes the process of laser cooling using magneto-optical traps. This technique, developed in the 1980s, allows scientists to cool atoms to microkelvins, enabling the study of atomic phenomena and applications in sensitive detectors and atomic clocks. Cold atoms are crucial for probing physics frontiers, detecting gravitational waves, and studying Bose-Einstein condensation.

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