A region of turbulent plasma between a star’s core and its visible photosphere at the surface, through which energy is transferred by convection. In the convection zone, hot plasma rises, cools as it nears the surface, and falls to be heated and rise again.
Where are convective zones?
The convection zone is the outer-most layer of the solar interior. It extends from a depth of about 200,000 km right up to the visible surface. At the base of the convection zone the temperature is about 2,000,000° C.
Why is the convection zone important?
The most efficient means of energy transfer is now convection and we find ourselves in the region of the Sun’s interior know as the convection zone. The hotter material near the top of the radiation zone (the bottom of the convection zone) rises up and the cooler material sinks to the bottom.
What is the difference between the radiative and convection zones?
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. … In the convective zone, heat and energy are carried outward along with matter in swirling flows called convection cells.
Which of these is the region between the core and the convection zone?
In main sequence stars similar to the Sun, which have a radiative core and convective envelope, the transition region between the convection zone and the radiation zone is called the tachocline.
What is a radioactive zone?
The layer of a star that lies just outside the core, to which radiant energy is transferred from the core in the form of photons. In this layer, photons bounce off other particles, following fairly random paths until they enter the convection zone.
Where is the Radiative Zone?
Just outside the Inner Core of the sun at a distance approximately 0.25 to 0.7 solar radii lies the Radiative Zone. This zone radiates energy through the process of photon emission and capture by the hydrogen and helium ions.
What are the 5 layers of the sun?
The inner layers are the Core, Radiative Zone and Convection Zone. The outer layers are the Photosphere, the Chromosphere, the Transition Region and the Corona.
How hot is the radiative zone?
Radiative Zone: Temperature falls from about 7 million to about 2 million K across this zone. Convection Zone: drops from 2 million K to 5800K in this zone. Photosphere: about 5800K, although sunspots are about 3800 K – that’s why they are dark.
How long does it take for a photon to travel through the convective zone?
It is well reported that it can potentially take upwards of a million years from a photon to take a “Random Walk” through the Core and Radiative Zone, but how long in the Convection Zone? One source states that it may only take about 10 days to travel the 200,000 km journey.
Does the Sun have Corona?
The corona is the outer atmosphere of the Sun. It extends many thousands of kilometers (miles) above the visible “surface” of the Sun, gradually transforming into the solar wind that flows outward through our solar system. The material in the corona is an extremely hot but very tenuous plasma.
Is the Sun’s energy nuclear?
The energy from the Sun – both heat and light energy – originates from a nuclear fusion process that is occurring inside the core of the Sun. The specific type of fusion that occurs inside of the Sun is known as proton-proton fusion. … The rest of the Sun is heated by energy transferred outward from the core.
Is the Sun convective?
The source of the Sun’s energy is the nuclear reactions that occur in its core. … This type of energy transport is convection. Convection motions within the solar interior generate magnetic fields that emerge at the surface as sunspots, and loops of hot gas called prominences.
Why does it take so long to go through radiative zone?
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.
Why does heat energy build up outside of the radiative zone?
Outside of the core is the radiative zone where energy is transported by radiation. According to the Contemporary Physics Education Project’s sun information, “It becomes less efficient for energy to move by radiation, and heat energy starts to build up at the outside of the radiative zone.
How long does it take energy to get through the radiative zone?
Sometimes it moves outward, sometimes inward and just a often it moves side to side. It takes over 170 thousand years for the energy released in the core of the Sun to get out of the radiation zone!
Is Chernobyl reactor 4 still burning?
The accident destroyed reactor 4, killing 30 operators and firemen within three months and causing numerous other deaths in weeks and months that followed. … By 06:35 on 26 April, all fires at the power plant had been extinguished, apart from the fire inside reactor 4, which continued to burn for many days.
Will Chernobyl ever be habitable?
Experts estimate Chernobyl could be habitable again anywhere from 20 to several hundreds of years. Long-term effects of more mild forms of radiation are unclear. … In the immediate aftermath of the Chernobyl disaster, thousands of people evacuated from cities in and around Ukraine.
Is Chernobyl still in operation?
View of the plant in 2013. The three other reactors remained operational after the accident but were eventually shut down by 2000, although the plant remains in the process of decommissioning as of 2021. … Nuclear waste clean-up is scheduled for completion in 2065.
What is the hottest layer in the sun’s atmosphere?
The outermost atmospheric layer is the corona, which gets really hot, almost 2,000,000 degrees F. This is where the solar wind begins. These layers can only be seen during total solar eclipses.
Which best describes the shape of a convection current?
The shape of a convection current would be circular. Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling, sinking again and then heating, rising and repeating the cycle over and over.
What are the 8 parts of the sun?
Inside the sun
- Chromosphere. Chromosphere. The chromosphere is the lowest layer of the sun’s atmosphere. …
- Corona. Corona. …
- Photosphere. Photosphere. …
- Convective zone. Convective zone. …
- Radiative. zone. …
- Core. Core.