Applications of Kirchoffs Law
Kirchhoff’s Laws are applications of two fundamental conservation laws: the Law of Conservation of Energy, and the Law of Conservation of Charge. (i) The silvered…
Physics
Explain Kirchoff’s Law
According to Kirchoff’s Law, the ratio of emissive power to the absorptive power corresponding to a particular wavelength and at a given temperature is always…
Explain Prevost’s theory of Heat Exchanges
Prevost applied the idea of thermal equilibrium to radiation. According to him, the rate at which a body radiates or absorbs heat depends on the…
Explain Fery’s Black Body
Fery’s black body consists of a double walled hollow sphere having a small opening O on one side and a conical projection P just opposite…
Define Perfect Black Body
A perfect black body is the one which absorbs completely heat radiations of all wavelengths which fall on it and emits heat radiations of all…
Define Emissive Power
The emissive power of a body at a given temperature is the amount of energy emitted per unit time per unit area of the surface…
What is Absorptive Power?
Absorptive power of a body for a given wavelength and temperature is defined as the ratio of the radiant energy absorbed per unit area per…
What is Thermal Radiation?
The energy emitted by a body in the form of radiation on account of its temperature is called thermal radiation. It depends on, (i) temperature…
Describe on Transfer of Heat
There are three ways in which heat energy may get transferred from one place to another. These are conduction, convection and radiation. (a) Conduction Heat…
Explain Refrigerator according to Carrot’s Heat Engine
A refrigerator is a cooling device. An ideal refrigerator can be regarded as Carrot’s heat engine working in the reverse direction. Therefore, it is also…
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