Calling the Planck constant 'esoteric' seems odd even if expressing it in total layman's terms could be difficult. I don't see why explaining that it's a const

Calling the Planck constant 'esoteric' seems odd even if expressing it in total layman's terms could be difficult. I don't see why explaining that it's a constant relating to photons, light and energy would be too difficult, or too far away from the level the article is pitched at.