Spectral irradiance of a black body as defined by Planck's law: $$I\left(\lambda, T\right) = \frac{2{\pi}hc^2}{\lambda^5}\frac{1}{\exp\left(\displaystyle\frac{hc}{{\lambda}kT}\right) - 1}$$ where \(h\) is the Planck constant, \(c\) is the speed of light, and \(k\) is the Boltzmann constant.Explore the behaviour of the spectral irradiance by manipulating the black body temperature using the slider below:

The in-plot label highlights the wavelength at the point of maximum irradiance.