Laser-Trapped Metal Hydride Opens Door to Ultracold Hydrogen
Physicists trap calcium monohydride molecules with laser light, achieving millikelvin temperatures. This breakthrough could lead to ultracold hydrogen and new tests of fundamental physics.
quantum physics
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How Millikan’s Oil Drop Exercise Measured the Electron’s Charge
Discover how Robert Millikan’s classic oil drop experiment measured the electron’s charge, its controversial data selection, and its enduring legacy in modern physics and education.