The mode of transfer of heat which requires no medium, is called as : (a) radiation (b) conducti

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The mode of transfer of heat which requires no medium, is...

Key Concepts

Convection

Convection is the mode of heat transfer that involves the bulk movement of a fluid (gas or liquid) carrying energy from one place to another. It is governed by fluid dynamics and usually occurs in a medium, making it distinct from thermal radiation, which can occur even in a vacuum.

Conduction

Conduction is the mode of heat transfer that occurs through direct contact between particles in a material, where energy is passed by collisions and vibrations within the substance. It typically takes place in solids and requires the material to be in close physical contact, contrasting with the medium-independent process of radiation.

Heat Transfer

Heat transfer is the process by which thermal energy moves from regions of higher temperature to regions of lower temperature. It is a fundamental concept in thermodynamics and occurs through different mechanisms such as conduction, convection, and radiation, each with unique characteristics regarding the medium required and the method of energy transfer.

Thermal Radiation

Thermal radiation is the mode of heat transfer that does not require any medium, as it involves the emission and propagation of electromagnetic waves (primarily in the infrared spectrum). This allows energy to be transferred through a vacuum, such as the heat from the sun reaching the earth, distinguishing it from other modes that require a physical medium for transfer.

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