The Planck's constant h is a fundamental constant,playing a fundamental role in the quantum theory (when divided by 2,it is referred to as h-bar) ·h=6.62606957×10-34m2kg/s0s .(When multiplied by the frequency)it defines the 'quantum of energy'(the minimum quantity of energy which can be exchanged) Represents the connection between the wavelength and momentum of particles(wave-particle duality!) It defines the scale at which the natural phenomena become "quantistic"(and classical behavior disappears) “我今天推导出了一个概念，我想它应该和牛顿的那些成果一样伟大，并富于革命性。”“我今天推导出了一个概念，我想它应该和牛顿的那些成果一样伟大，并富于革命性