The principle stating that the wavelength of maximum radiation is inversely related to temperature is known as ______________ law?
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Answer: C. Wien’s displacement
Explanation
Wien's displacement law establishes that peak emission wavelength is inversely proportional to temperature. Higher temperature bodies emit thermal radiation concentrated at significantly shorter wavelengths. Multiplying peak wavelength by absolute temperature yields a constant value in meters-Kelvin. Black body radiation curves shift toward shorter wavelengths as absolute temperature increases. Wilhelm Wien derived this relationship from thermodynamic principles governing cavity radiation. Wavelengths are typically measured in micrometers for thermal engineering applications.
Stellar surface temperatures are determined by astronomers analyzing peak emission wavelengths using this law. Industrial infrared thermometers use Wien's law to calibrate temperature sensors for hot targets. Understanding peak radiation wavelengths helps select appropriate optical materials for thermal sensors. Stefan-Boltzmann law relates total radiant energy flux to the fourth power of temperature. Planck's law provides the complete spectral radiance distribution across all emission wavelengths. None of these is incorrect because Wien's displacement law is definitively the correct principle.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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