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what are the different modes of transfer of heat

Heat can be transferred from a hot object to a cold object in three different ways:

(I) by conduction

(ii) by convection and

(iii) by radiation (or heat rays)

• Conduction is the transfer of heat from the hotter parts of a material to its colder part without the movements of material as a whole.

• Convection is the transfer of heat from the hotter parts of a liquid to its colder parts by the movement of the liquid itself.

• Radiation is the transfer of heat energy from a hot body to a cold body by means of heat rays, without any material medium between them.