Answer:
The sun layer that radiates most light that reaches earth is called photosphere.
Step-by-step explanation:
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.