Wien displacement law
E31550
Wien's displacement law is a physical law that relates the temperature of a blackbody to the wavelength at which it emits radiation most intensely.
Aliases (1)
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
empirical law
→
law of black-body radiation → physical law → |
| appliesTo |
blackbody
→
|
| approximationOf |
Planck radiation law
→
|
| assumes |
continuous spectrum
→
isotropic emission → |
| category |
laws of physics
→
radiation laws → |
| constantApproximateValue |
2.897771955×10^-3 m·K
→
|
| constantSymbol |
b
→
|
| describes |
relationship between blackbody temperature and peak emission wavelength
→
|
| domain |
thermal equilibrium
→
|
| field |
astrophysics
→
statistical mechanics → thermal radiation → thermodynamics → |
| hasConsequence |
color of a blackbody shifts from red to blue as temperature increases
→
peak of solar spectrum lies in visible range due to Sun’s surface temperature → |
| hasConstant |
Wien displacement constant
→
|
| hasEquation |
λ_max = b / T
→
ν_max ≈ (k_B T)/h (for frequency form, approximate) → |
| hasSIUnitForConstant |
meter kelvin
→
|
| implies |
cooler bodies emit peak radiation at longer wavelengths
→
hotter bodies emit peak radiation at shorter wavelengths → |
| isPartOf |
black-body radiation theory
→
|
| namedAfter |
Wilhelm Wien
→
|
| namedEntityType |
scientific law
→
|
| predicts |
wavelength of peak emission for a blackbody at given temperature
→
|
| relatedTo |
Planck radiation law
→
Rayleigh–Jeans law → Stefan–Boltzmann law → |
| relatesQuantity |
temperature
→
wavelength of maximum spectral radiance → |
| supportsConcept |
color–temperature relation of stars
→
|
| symbolicForm |
λ_max T = b
→
|
| usedFor |
design of thermal radiation sources
→
estimating surface temperature of stars from color → estimating temperature of incandescent objects from emission spectrum → infrared thermometry → thermal imaging calibration → |
| validFor |
ideal blackbody
→
|
| yearProposed |
1893
→
|
Referenced by (2)
| Subject (surface form when different) | Predicate |
|---|---|
|
Planck radiation law
→
Stefan–Boltzmann law ("Wien’s displacement law") → |
relatedTo |