The layer of the sun that radiates most of the light that reaches earth is called the ionosphere corona chromosphere photosphere megasphere

The sun layer that radiates most light that reaches earth is called photosphere.

The photosphere is 400 km thick and it is the area visible when looking at the sun that provides light to the earth. The sun rays are normally visible with a naked eye when looking at the sun and this due to the fact that the sun is very far from the earth.

In actual fact, the sun lacks a surface due to the high temperature that will not allow the matter to exist. The temperature of the photosphere is 4400 kelvins to 100,000 kelvins.