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主题:霍金希望刻在墓碑上的方程 -- PBS
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The formula
S = entropy (a thermodynamic quantity representing the unavailability of a
system’s thermal energy for conversion into mechanical work)
h = Planck constant (the energy of a quantum of electromagnetic radiation
divided by its frequency)
G = Newton’s constant (universal gravitational constant)
A = area of event horizon (a boundary in spacetime beyond which events
cannot affect an outside observer)
c = speed of light
k = Boltzmann’s constant (relates the average kinetic energy of particles
in a gas with the temperature of the gas)