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所谓外推法是指将研究的物理过程或物理变量外推到理想极限加以考察,从而得出某种结论或判断的方法.例如伽利略在著名的斜面实验中,把第二个斜面外推到极限——水平面.并由此提出:小球就再也达不到原来的高度而要沿着水平面以恒定速度持续运动下去的科学猜想;开尔文把查理定律“外推”到压强为零的点,从而确定热力学温标的零点等都是科学研究中典型的外推方法的应用.
The so-called extrapolation method refers to the extrapolation of the physical process or physical variable of the study to the ideal limit to examine it, so as to come up with some kind of conclusion or judgment method. For example, Galileo extrapolated the second bevel to the famous oblique experiment. The limit - the level of water, and thus put forward: the scientific conjecture that the ball will no longer reach its original height and will continue to move at a constant speed along the horizontal plane; Kelvin extrapolates Charlie’s law to zero pressure The point to determine the zero point of the thermodynamic temperature scale is the application of the typical extrapolation method in scientific research.