Why
Local Approximation: Newton's laws of motion (F = ma) provided an effective model for describing motion within the constraints of human experience. This system used units of force, mass, and acceleration that were scaled to human scales, and provided a reasonably accurate approximation within our limited conditions of low speeds and weak gravitational fields.The Inconsistency of Gravity: When Newton extended his laws of motion to gravity, he found that his initial formula was inconsistent with observed gravitational forces, and it was off by a linear scaling factor. This scaling factor was required to match the value with the measured force of gravity.The Gravitational Constant : The gravitational constantG is the linear scaling factor that Newton needed to make his formula, F=Gm₁m₂/r², match the values that were measured in the real world.
The Need for Scaling: Planck's work in quantum mechanics led him to explore the relationship between the frequency of light and its energy. He observed that there was a linear relationship between these two, but that he needed a scaling factor to reconcile the two.The Planck Constant : The constanth , now known as Planck's constant, provided the linear scaling necessary to relate the frequency of light to its energy through the equation E = hf.An Unknown Connection: At the time, Planck was not aware of any connection between his constant and the nature of space-time, the speed of light, or to the gravitational constant. He did not understand thath contained a 1/c term.
Serendipitous Embedding of 1/c: Planck's constant, while seemingly distinct from the gravitational constant, accidentally embedded a 1/c term within it. This embedded factor, hidden from view for more than a century, has been the key to unlocking a deeper understanding of how quantum mechanics and classical physics relate. This 1/c is what converts the frequency into wavelength.A Missed Opportunity: If the physics community had recognized the 1/c component ofh earlier, quantum mechanics could have been seen as a linear scaling of classical physics, potentially accelerating the unification of these fields.Unified Scaling of Space-Time: The fundamental constantsh andG were independently discovered as necessary scaling factors to bring measurements into the human scale of space and time, but what neither man knew was that these scaling factors were related to curved space time.Shared Dimensional Units : The shared dimensional units of kg m³/s² betweenh andG are an important hint that both share something fundamental.
The Keys to Unification: The constants are composed of two underlying unit scaling factors: s_length and s_mass. The constants are simply these values combined.The Inversion of Mass: The way that mass is scaled by s_mass is inverted between Planck's constant (h ) and the gravitational constant (G ). This inversion is directly connected to the position of mass in the gravity equation, and the position of wavelength in the frequency equation.1/c Converts Frequency to Wavelength : The 1/c in Planck's constant hides the fact that both Planck and Newton's constants are scaling these values with the same geometric relationship to space and time.Defining The fundamental constants can be defined in terms of the s_length and s_mass:h andG :hc = (s_length * s_mass) h = (s_length * s_mass) / c G = (s_length / s_mass)
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