Reflectance, Absorptance & Transmittance-   When thermal radiation falls on a body, they are partly reflected, absorbed and rest get transmitted.   Let Q be the amount of thermal energy incident on a body. Suppose- The part R is reflected The part A is absorbed The part T is transmitted     By energy conservation […]

Thermal Radiation-   Before you go through this article, make sure that you have gone through the previous article on Thermal Radiation.   We have learnt that- Thermal radiation are electromagnetic waves emitted by a body by virtue of its temperature. They are produced due to thermal motion of particles & cause heating effect.   […]

Thermal Radiation-   The electromagnetic radiations emitted by a body by virtue of its temperature are called thermal radiation or radiant energy.   All bodies having temperature above 0 K emit thermal radiation continuously.   Examples- The radiations emitted by a red-hot iron are thermal radiation. The light from a filament lamp are thermal radiation.   […]