CLASS XII PHYSICS

CHAPTER 1 - HEAT

CALORIC THEORY

In order to explain the nature of heat , in the beginning of the nineteenth century a famous scientist Calorie presented the theory called as the caloric theory.According to this theory

 " Heat is present in every material body in the form of hypothetical weightless fluid called caloric."

            Further if there is no transfer of heat , takes place from the material body then the amount of caloric remains constant in the body.Difference of temperature between the bodies was assumed to be due to the presence of different amounts of caloric.

                                                                                                                       The reason of the acceptance of the caloric theory was its successful explanation of heat transfer such as conduction and convection.