Radiation is the transfer of energy through electromagnetic waves or particles. Unlike conduction and convection, radiation does not require a medium and can occur in a vacuum. It includes visible light, infrared radiation, ultraviolet rays, and other electromagnetic waves. Objects emit radiation based on their temperature and surface properties.

Class 11 Physics Chapter 10 Thermal Properties of Matter covers topics such as temperature and heat expansion of solids liquids and gases specific heat capacity and latent heat. It explains thermal equilibrium laws of thermodynamics and heat transfer methods like conduction convection and radiation. The chapter also explores how matter behaves at different temperatures.