A Planck? Planck’s constant like the physics number for something complicated? Nah, that’s not keyboard related. But maybe it is. Let’s talk about Planck keyboards, a special keyboard that ...

"The date, April 14th, represents the first three digits of Planck's constant, which describes the relationship between the energy and frequency of a quantum of energy (such as a photon): 4.14×10 ...

This date was selected for Quantum Day because 4.14 are the rounded first digits of Planck’s constant – 4.1356677×10-15 eV⋅s – a product of energy and time that is the fundamental constant governing ...