Solar radiation that is visible at the earths surface is

Visible light

Explanation:

The part of solar radiation that is visible at the earth's surface is called the visible light.

Human eyes is sensitive and able to detect electromagnetic radiation within this range.

It is located between 400 - 700nm range in the spectrum. Below it is the Infrared zone Above it is the ultraviolet All the colors we perceive are domiciled here. In the absence of this range, one will not be able to see.