Black Body Radiation in Quantum Theory
Dive into the concepts of black body radiation in quantum theory with Dr. Sakuntala Gupta's insightful lecture. Learn about emissive power, absorptive power, and Kirchhoff's theorem regarding perfect black bodies.
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Presentation Transcript
Black Body Radiation: (Introductory Lecture of Quantum Theory : Quantum Mechanics-I. PG Semester II) PHYPG2101 Presented by Dr. Sakuntala Gupta Associate Professor Department of Physics Raiganj University India Sakuntala_gupta@yahoo.com
Introductory Lectures on Quantum Theory
Then its absorptive power is unity. Such a body is called a black body. Then according to Kirchhoff's theorem, "For a body of any arbitrary material emitting and absorbing thermal electromagnetic radiation at every wavelength in thermodynamic equilibrium, the ratio of its emissive power to its dimensionless co efficient of absorption is equal to a universal function only of radiative wavelength and temperature. That universal function describes the perfect black-body emissive power".
