If the temperature of the sun were to increase from T to 2 T and its radius from R to 2 R, then the ratio of the radiant energy received on earth to what it was previously, will be

Energy is the capacity to do work or produce heat and exists in various forms such as kinetic, potential, thermal, and chemical. It can be transformed from one form to another but cannot be created or destroyed, according to the law of conservation of energy. Energy is essential in all physical processes.

Class 11 Physics Chapter 10 Thermal Properties of Matter focuses on heat transfer methods including conduction, convection and radiation. It examines concepts such as thermal expansion, specific heat capacity, calorimetry and latent heat. The chapter highlights the practical applications of these principles and their significance in understanding thermal behavior in various materials and scientific processes.