High School

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Energy is transported from the interior of the Sun to the exterior:

A. First by radiation, then by conduction
B. First by radiation, then by convection
C. First by convection, then by radiation
D. First by conduction, then by convection

Answer :

Energy is transported from the interior of the Sun to the exterior first by radiation, then by convection. The correct option is b) first by radiation, then by convection.

The core of the Sun, where nuclear fusion occurs, generates energy which is then transported outwards. Initially, this energy transfer happens through the absorption and reemission of photons, a process known as radiation. However, due to the opaqueness of gases in the Sun's interior, photons are absorbed quickly and cannot travel far. Afterwards, in the outer layers, energy is transferred mainly by convection, where hotter, less dense materials rise and cooler, denser materials sink, forming convection currents. The correct option is b) first by radiation, then by convection.

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