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The radiation zone or radiative zone is a layer of a star's interior where energy is primarily transported toward the exterior by means of radiative diffusion, rather than by convection.[1] Energy travels through the radiation zone in the form of electromagnetic radiation as photons. Within the Sun, the radiation zone is located in the intermediate zone between the solar core at .2 of the Sun's radius and the outer convection zone at .71 of the Sun's radius.[1]
Matter in a radiation zone is so dense that photons can travel only a short distance before they are absorbed or scattered by another particle, gradually shifting to longer wavelength as they do so. For this reason, it takes an average of 171,000 years for gamma rays from the core of the Sun to leave the radiation zone. Over this range, the temperature of the plasma drops from 15 million K near the core down to 1.5 million K at the base of the convection zone.[2]
Within a radiative zone, the temperature gradient-the change in temperature (T) as a function of radius (r)-is given by:
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What is the definition of the core from the sun?
It is the middle layer of the sun. It is surrounded by the Radiative Zone.
What is the radiative zone made of?
radiators.
How hot is the radiative zone in the sun?
The Sun's radiative zone is the section of the solar interior between the innermost core and the outer convective zone. In the radiative zone, energy generated by nuclear fusion in the core moves outward as electromagnetic radiation. In other words, the energy is conveyed by photons. When the energy reaches the top of the radiative zone, it begins to move in a different fashion in the convective zone. In the convective zone, heat and energy are carried outward along with matter in swirling flows called convection cells. This motion is similar to the roiling flows seen in a pot of boiling water. The inner parts of the Sun (core and radiative zone) spin differently than the outer layers (convective zone). The boundary between these two types of rotation, which lies between the radiative and convective zones, is called the tachocline. Many other stars also have radiative zones. The Sun's radiative zone extends from the core outward to about 70% of the Sun's radius. In a smaller (than the Sun) star that is cooler than our Sun, the convective zone tends to be larger, extending deeper into the star's interior. Thus the radiative zone tends to be smaller. In very small, cool stars the convective zone may reach all the way to the star's core, and there may be no radiative zone at all. In a larger (than the Sun) star with a higher temperature, the radiative zone tends to be larger and the convective zone smaller. Especially large, hot stars may not have a convective zone at all - their radiative zone may extend all the way from the core to the star's surface.
What are the three parts of the interior if the sun?
The radiative zone, the convective zone, and the photosphere.
What are the three main parts of the sun?
The core, the radiative zone, and the convective zone.
What is the definition of the core from the sun?
It is the middle layer of the sun. It is surrounded by the Radiative Zone.
How do the temperatures of the radiative zone and the convection zone compare?
the radiative zone is hotter
What is the layer of the sun thorugh which energy is transferred away from the core buy radiation?
The Radiative Zone
Definition of Radiative energy?
Radiative energy is carried by light.
What is the radiative zone made of?
radiators.
What is a interior layers of sun?
They are the Convection Zone, Radiative Zone, then the Core.
What are the main part of the sun?
The core, the radiative zone, and the convective zone.
Middle layer of the sun?
radiative zone
Which energy escape into space?
radiative zone
What are the three main part of the sun?
The core, the radiative zone, and the convective zone.
What are the three parts of the interior if the sun?
The radiative zone, the convective zone, and the photosphere.
The dense layer of the sun that blocks energy and light is the zone?
radiative zone
