An innovative technique for real-time adjusting exposure time of silicon-based camera to get stable gray level images with temperature evolution
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Black-body radiation
Gray level
Gray (unit)
Low temperature extended area blackbody,as a standard radiation source of infrared spectrum,is generally used in the calibration of IR sensors and thermal imagers.With the development of infrared technology,its application has been more and more popular and extended to low temperature area.Temperature uniformity is an important parameter of the extended area blackbody.A kind of uniform temperature structure which can improve the temperature uniformity is introduced.The experimental results show that the structure can make the extended area blackbody temperature uniformity better than 0.2K.
Black-body radiation
Thermal Radiation
Maximum temperature
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Integration of the Planck function over almost any band of wavelengths normally of interest to meteorology is shown now to be practical using modern scientific pocket calculators. A graph of the integral and an example are included.
Black-body radiation
Planck's law
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Black-body radiation
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At the end of the 19th century, German physicist Victor Brooks first proposed black hole radiation. He found that objects emit electromagnetic waves when they are heated. Brooks found that the spectral density of electromagnetic waves is proportional to the temperature of the body, which is called blackbody radiation. The research of blackbody radiation began in the middle of the 19th century, studying radiator and radiation standards to meet the needs of industrial applications. The experimental results show that, especially by interpreting the spectral distribution of Planck's formula, many new physics and concepts have emerged, and many important material concepts, quantum mechanics, quantum theory of solid conductors, induction emission, quantum statistics, etc. have been developed. This study enriches thermodynamics and provides insights into the nature of light. The first aim of this paper is to derive the Planck’s Law using two different methods: one is by following the Planck’s derivation, while the other is by using Planck’s interpretation of his formula. The second aim of this paper is to use the Planck’s Law to derive Wien’s Law and Stefan’s Law.
Black-body radiation
Planck's law
Planck energy
Planck length
Black hole (networking)
Planck Constant
Physical law
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THERMAL RADIATION AND PLANCK’S FORMULA. In this paper, theoretical and experimental research on blackbody thermal radiation is discussed and historically ordered. The main thermal radiation equations following Planck’s revolutionary idea are obtained using the formalism of statistical mechanics. These equations, already well known, are deduced in a very detailed and didactic way in order to facilitate the reader’s understanding. The consequent results of Planck’s formula for blackbody radiation are analyzed: the limits of the average energy for frequencies tending to zero and infinity, Stefan’s law and Wien’s displacement law.
Black-body radiation
Planck energy
Thermal Radiation
Formalism (music)
Planck's law
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In this paper, we compare the blackbody radiation density formula obtained with classical physics by Hugh L Callendar and the formula obtained by Max Planck using the quantization of energy.We use R and Maxima to analyze their fitness on coordinating experimental data and indicate some limitations with experiments in this area.
Black-body radiation
Planck energy
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For the calibration of radiation detectors, use is currently made of blackbodies, assuming they satisfy Planck's Law. The first problem considered here is then: how well has this law been checked experimentally? Now, it has been pointed out (Crovini and Galgani 1984) that essentially no new experiments have been made after 1921 (Rubens and Michel 1921), when the data were interpreted as fitting the theoretical law within 1%. But, in fact, this work made use of the value 14300 (in suitable units) of the second radiation constant, while the presently adopted value is 14388. When one inserts this value into the calculations, one finds that, indeed, Planck's Law has been checked only to 3%.
Black-body radiation
Planck's law
Planck energy
Value (mathematics)
Constant (computer programming)
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Black-body radiation
Planck's law
Planck energy
Value (mathematics)
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Abstract After studying the normalized Planck equation in depth, a brand-new type of spectrum curves of blackbody thermal radiation is given. Two important parameters of the new type curves, namely relative width RW η and symmetric factor RSF η , are defined. The paper points out that the experimental verification of the parameters has three significant applications: (1) Giving a method to measure temperature by detecting the radiation wavelength. (2) Determining the blackbody grade. (3) The temperature obtained from the law of the blackbody thermal radiation can be used as a criterion.
Black-body radiation
Thermal Radiation
Electromagnetic spectrum
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This viewgraph presentation reviews the 1901 work in Planck's constant and blackbody radiation law and the 1916 Einstein rederivation of the blackbody radiation law. It also reviews Wien's law. It also presents equations that demonstrate the thermal balance between radiation and matter.
Black-body radiation
Planck's law
Thermal Radiation
Planck energy
Boltzmann constant
Einstein coefficients
Thermal equilibrium
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