Difference between convection and radiation
Convection |
Radiation |
The transfer of heat through the liquid is known as convection. | Radiation involves the transfer of heat through the electromagnetic waves in which the particles are not involved. |
The rate of transfer of the heat in the convection system is slow than the radiation. | The rate of transfer of heat in the radiation is fastest as compared to the convection and the conduction. |
In the convection the transfer of the heat takes place due to the difference between the densities of two system | Radiation takes place in the objects which have temperature more than 0 k. |
In the convection the transfer of the heat takes place from the region of low density to the region of high density. | It transfer the heat through all the bodies which follow the rule of temperature more than 0 k. |
In the convection the transfer of heat takes place between the two objects which are in contact. Example of these is – transfer of heat between the air and water or water and solid. | Radiation can takes place and transfer the heat through a large distance without intervening the medium. |
The transfer of the heat in the convection takes place due to the motion of the fluid. | The transfer of the heat takes place in the radiation is due to the electromagnetic waves. |
In the convection the transfer of heat takes place through the actual flow of matter. | In the radiation the heat is not transferred through the actual flow of matter but due to electromagnetic waves without involvement of particles. |
Convection does not obeys the law of reflection and refraction. | Radiation obey the law of reflection and refraction. |