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Physics

Numerical Problems on Newton’s Law of Cooling

Science > Physics > Radiation > Numerical Problems on Newton’s Law of Cooling In this article, we are going to study to solve numerical problems based on Newton’s law of cooling. Newton’s Law of Cooling: The rate of loss of heat by a body is directly proportional to its excess temperature over that of the […]

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Physics

Stefan’s Law of Radiation

Science > Physics > Radiation > Stefan’s Law of Radiation In this article, we shall study Stefan’s law of radiation, Newton’s law of cooling, derivation of Newton’s law of cooling from Stefan’s law and to calculate the temperature of the solar surface. Stefan’s Law: Statement: The heat energy radiated per unit time per unit area […]

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Physics

Concept of Black Body

Science > Physics > Radiation > Concept of Black Body In this article, we shall study the concept of a black body and its realization in practice. Perfectly Black Body: A body which absorbs all the radiant heat incident upon it is called a perfectly black body. Thus the coefficient of absorption of a perfectly […]

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Physics

Kirchhoff’s law of Radiation

Science > Physics > Radiation > Kirchhoff’s law of Radiation In this article, we shall study Kirchhoff’s law of radiation and its theoretical and experimental proof. Statement: The ratio of the emissive power to the coefficient of absorption is constant for all substances at a given temperature and is equal to the emissive power of […]