Plank辐射公式中对数范围图有限范围

我想绘制普朗克辐射方程,如下所示。当我使用Mathematica时,绘图效果很好,但是当我尝试用Python来完成时,我无法正确理解它。它基本不会低于〜1.0微米波长。请参阅附件图片和代码。如果你能提供帮助,这将是非常可观的。先谢谢你。Plank辐射公式中对数范围图有限范围

import matplotlib.pyplot as plt 

from matplotlib import pyplot

from matplotlib import pylab

import numpy as np

h = 6.626e-34

c = 2.9979e+8

k = 1.38e-23

def planck(wav, T):

a = 2.0*3.14*h*c**2

b = h*c/(wav*1e3*1e-9*k*T)

intensity = a/ (((wav*1e3*1e-9)**5) * (np.exp(b) - 1.0))*1e-6

return intensity

wavelengths = np.logspace(1e-2, 1e2, 1e4, endpoint=False)

intensity310 = planck(wavelengths, 310.)

intensity3000 = planck(wavelengths, 3000.)

intensity5800 = planck(wavelengths, 5800.)

intensity15000 = planck(wavelengths, 15000.)

plt.plot(wavelengths, intensity310, 'k-') # 5000K Black line

plt.plot(wavelengths, intensity3000, 'r-') # 5000K green line

plt.plot(wavelengths, intensity5800, 'y-') # 6000K blue line

plt.plot(wavelengths, intensity15000, 'b-') # 7000K Red line

pyplot.xscale('log')

pyplot.yscale('log')

pylab.xlim([1e-2,1e2])

pylab.ylim([1,1e10])

plt.show()

使用Python

使用Mathematica

一个计谋的计策

回答:

。在你的np.logspace()用法是错误的。如果您需要1e-21e2之间的值,则应该分别使用参数-22(即np.logspace(-2, 2, 1e4))调用该函数。此外,如果您想创建一个日志缩放图,则可以使用pyplot.loglog()函数。没有必要导入pylab。请参见下面的代码:

import matplotlib.pyplot as plt 

import numpy as np

h = 6.626e-34

c = 2.9979e+8

k = 1.38e-23

def planck(wav, T):

a = 2.0*3.14*h*c**2

b = h*c/(wav*1e3*1e-9*k*T)

intensity = a/ (((wav*1e3*1e-9)**5) * (np.exp(b) - 1.0))*1e-6

return intensity

wavelengths = np.logspace(-2, 2, 1e4, endpoint=False)

intensity310 = planck(wavelengths, 310.)

intensity3000 = planck(wavelengths, 3000.)

intensity5800 = planck(wavelengths, 5800.)

intensity15000 = planck(wavelengths, 15000.)

plt.loglog(wavelengths, intensity310, 'k-') # 5000K Black line

plt.loglog(wavelengths, intensity3000, 'r-') # 5000K green line

plt.loglog(wavelengths, intensity5800, 'y-') # 6000K blue line

plt.loglog(wavelengths, intensity15000, 'b-') # 7000K Red line

plt.xlim([1e-2,1e2])

plt.ylim([1,1e10])

plt.show()

我碰到下面的情节:

以上是 Plank辐射公式中对数范围图有限范围 的全部内容, 来源链接: utcz.com/qa/260473.html

回到顶部