What the hell is this sign about?
That's what this is about.
The Planck constant, or Planck's constant, denoted "h" is a physical constant that is the quantum of electromagnetic action, which relates the energy carried by a photon to its frequency. A photon's energy is equal to its frequency multiplied by the Planck constant. The Planck constant is of fundamental importance in quantum mechanics, and in metrology it is the basis for the definition of the kilogram.
This is the Planck constant from 1985, the correct constant and represents what the makers of Season 3's Stranger Things Should have used in the show instead of the one they did use, which was from 2014.
It doesn't get much nerdier than this.
Aromatic cedar sign with leather hanger cord.
Exactly as seen.
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