Which does not require a medium to transfer thermal energy?a)Convectionb)Transportationc)Radiationd)None of theseCorrect answer is option 'C'. Can you explain this answer?

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Answer

Radiation
Radiation does not require a medium to transfer thermal energy. It is the transfer of heat through electromagnetic waves, such as infrared radiation from the sun. Unlike convection and conduction, which require a medium (such as air or a solid material) to transfer heat, radiation can occur through a vacuum. This is why we can feel the warmth of the sun even though space is a vacuum.

Convection and Transportation
Convection and transportation, on the other hand, require a medium to transfer thermal energy. Convection is the transfer of heat through the movement of fluids (liquids or gases), while transportation involves the movement of heat through a solid material. Both processes rely on the physical movement of particles to transfer heat from one place to another.
In conclusion, radiation is the only method of heat transfer that does not require a medium. It is important to understand these different mechanisms of heat transfer to better comprehend how thermal energy moves in various systems and environments.

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