How is transfer of energy by radiation differ from either conduction or convection?

Transfer of energy by radiation does not require a medium and can occur through a vacuum, unlike conduction and convection which require a material medium. Radiation involves the movement of electromagnetic waves, such as infrared radiation, while conduction and convection involve the transfer of heat through direct contact or movement of a fluid, respectively. Radiation is not dependent on the temperature difference between objects, unlike conduction and convection which rely on temperature differentials for heat transfer.