When Planck, and later Einstein, introduced the =ℎ formula , their conclusions were based on the interaction of light with matter at atomic and molecular scales. However, light–matter interaction fundamentally depends on the size of the receiver—effectively, the antenna. For efficient power absorption, the receiving antenna must typically be smaller than the wavelength of the incoming radiation. This is why =ℎ appeared valid when applied to sub-micrometer structures such as atoms and molecules. From an electromagnetic standpoint, these were effectively tiny antennas, smaller than the wavelength of visible light. But such antennas are inherently incapable of detecting radiation at millimeter or longer wavelengths. Therefore, the justification for =ℎ was rooted in a test setup that did not account for scale and wavelength limitations—calling into question its universal applicability. Despite this, the formula has been treated as foundational and even incorporated into the derivation of the Schrödinger equation. It is possible that some of the shortcomings of Schrödinger’s equation stem from this questionable assumption. Also, https://www.researchgate.net/publication/382286416_Critique_...