Wien’s Displacement Constant
Wein’s Displacement Constant is the physical constant that is represented by b in Wein’s Displacement Law. The value of Wein’s Displacement constant in SI units is 2.878 × 10−3 mK or if we change the unit of length to the micrometer, then b ≈ 2898 μm⋅K.
Black Body Radiation
Electromagnetic radiation emitted by the Black Body is called Black Body Radiation. Black Body is an ideal opaque matter which can absorb all the radiation falling onto it. It is also a perfect emitter of radiation which means it can emit radiation of all wavelengths.
Black Body Radiation with Planck’s Law
Planck’s Law or Planck’s Radiation law describes how the temperature of the surface of the black body and the emitted radiation by the black body are related, and the mathematical formula for this law is given as follows:
Where,
- B(ν, T) is the enegery radiated per unit area per unit time form the body,
- ν is Frequency,
- kb is Boltzmann Constant,
- h is Planck’s Constant, and
- c is speed of light in vacuum.
Wien’s Displacement Law
Wein’s Displacement Law or Wein’s Law is named after the man who discovered it, Wilhelm Wien; a German physicist. Wilhelm Wein has done remarkable work in the field of Radiation, for which he was granted a noble price for physics in 1911. Max Planck who was a colleague of Wien, continued his work on the same topic and gave Wein-Plank Law and further a more general law Planck’s Law of Radiation. Wein’s Displacement Law is a fundamental concept in the study of radiation and describes the relationship between the temperature of an object and the wavelength of its maximum emission of radiation. This short article provides a thorough explanation of Wein’s law, including the mathematical formulation and various ways it can be expressed.
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