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Wien's displacement law states that the black body radiation curve for different temperatures peaks at a wavelength inversely proportional to the temperature. It describes the relationship between the temperature of a black body and the wavelength at which it emits the most radiation.
The calculator uses Wien's displacement law:
Where:
Explanation: The formula calculates the absolute temperature of a black body based on the wavelength at which it emits the maximum amount of radiation.
Details: Accurate temperature calculation using Wien's law is crucial in astrophysics, thermal imaging, and materials science for determining the temperature of stars, objects, and surfaces based on their radiation spectra.
Tips: Enter the wavelength of maximum radiation emission in meters. The value must be greater than zero for accurate calculation.
Q1: What is the Wien displacement constant?
A: The Wien displacement constant is approximately 2.897771955 × 10⁻³ m·K, which relates the peak wavelength of black body radiation to its temperature.
Q2: How accurate is Wien's displacement law?
A: Wien's law provides accurate results for black bodies and is widely used in physics and engineering, though real objects may deviate from ideal black body behavior.
Q3: What units should be used for wavelength?
A: Wavelength should be entered in meters (m) for proper calculation with the Wien displacement constant.
Q4: Can this calculator be used for non-black bodies?
A: The calculator is designed for ideal black bodies. For real objects, additional factors like emissivity may need to be considered.
Q5: What are typical wavelength values for common temperatures?
A: For example, the Sun (≈5800 K) has peak emission around 500 nm, while room temperature objects (≈300 K) peak around 10 μm.