The solar constant (1353W/m^2) is defined as the solar energy falling per unit time at normal incidence on a unit area at the Earth. Take the distance from the sun to Earth as 1.5*10^11m and the diameter of sun as 1.39*10^9m a)caculate the rate of energy generation of the sun b)The surface temperature is around 6000K determine the Stefan-Boltzmann constant in stefan's law from data above. 我的算法是先假設太陽的能量是一個球狀的均勻散布,因此由solar constant可以求出 太陽的總功率(1353*4Pi*(1.5*10^11)^2) 然後再除以太陽的表面積可以得到單位面積的功率 最後再根據單位面積功率=σT^4 求出Stefan Boltzmann constant 可是這樣算出來跟理論值差滿多的(4.86*10^-8,理論值5.67*10-8才對) 不知道是那個步驟有錯呢? 還是說純粹是題目的constant的關係? 煩請各位強者賜教 感激不盡! --

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