The part of the solar electromagnetic spectrum with the maximum intensity is the visible light region, specifically around 500 nanometers. This is the green-yellow part of the spectrum.

Here's why:

* Blackbody Radiation: The Sun emits radiation like a blackbody, meaning its radiation intensity is distributed according to its temperature.

* Wien's Displacement Law: This law states that the wavelength at which a blackbody emits the most radiation is inversely proportional to its temperature. The Sun's surface temperature is about 5778 Kelvin, which corresponds to a peak emission wavelength around 500 nanometers.

Therefore, while the Sun emits radiation across the entire electromagnetic spectrum, the visible light region, centered around 500 nanometers, has the highest intensity.