How to calculae the portions of the ultraviolt, visible and infrared lights in the solar light?-(1)

APPENDIX A: INTEGRATION OF THE PLANCK’S FUNCTION All materials emit a very wide band of lights, and the intensity of the strongest light varies depending on their temperatures, which is called the blackbody radiation. The power per each wavelength emitted from the blackbody was theoretically derived by Max Karl Ernst Ludwig Planck and it is called Planck’s radiation law.

The theoretical formula of Planck's radiation law can be expressed in two forms; one is based on the wavelength and the other ...