Radiative zone

Definition

The radiative zone is a layer of the Sun's interior where energy is primarily transported outward by radiative diffusion rather than by convection. It lies between the innermost core and the outer convective zone.

5 Must Know Facts For Your Next Test

1. The radiative zone extends from about 0.2 to 0.7 solar radii.
2. Energy transfer in the radiative zone occurs through photon absorption and re-emission.
3. Temperatures in the radiative zone range from approximately 2 million to 7 million Kelvin.
4. It takes photons thousands of years to travel through the radiative zone due to constant absorption and re-emission.
5. The density of matter in the radiative zone decreases with distance from the core.

Review Questions

Related terms

Core:

The innermost layer of the Sun, where nuclear fusion occurs, producing energy.

Convective Zone:

The outer layer of the Sun's interior where energy is transferred by convection.

Photosphere:

The visible surface of the Sun, located above both the convective and radiative zones.