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Stefan Boltzmann Law Formula

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Black Body Radiant Emittance is the radiant flux emitted by a surface per unit area. Check FAQs

e b = [Stefan-BoltZ] \cdot T^{4}

e_b - Black Body Radiant Emittance?T - Temperature?[Stefan-BoltZ] - Stefan-Boltzmann Constant?

Stefan Boltzmann Law Example

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Here is how the Stefan Boltzmann Law equation looks like with Values.

Here is how the Stefan Boltzmann Law equation looks like with Units.

Here is how the Stefan Boltzmann Law equation looks like.

2.96 = 5.7E-8 \cdot 85^{4}

2.96W/m² = 5.7E-8 \cdot {85K}^{4}

2.96 = 5.7E-8 \cdot 85^{4}

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Stefan Boltzmann Law Solution

Follow our step by step solution on how to calculate Stefan Boltzmann Law?

FIRST Step Consider the formula

e b = [Stefan-BoltZ] \cdot T^{4}

Next Step Substitute values of Variables

∴

e b = [Stefan-BoltZ] \cdot {85K}^{4}

Next Step Substitute values of Constants

∴

e b = 5.7E-8 \cdot {85K}^{4}

Next Step Prepare to Evaluate

∴

e b = 5.7E-8 \cdot 85^{4}

Next Step Evaluate

∴

e b = 2.95996701379375W/m²

LAST Step Rounding Answer

∴

e b = 2.96W/m²

Stefan Boltzmann Law Formula Elements

Variables

Constants

Black Body Radiant Emittance

Black Body Radiant Emittance is the radiant flux emitted by a surface per unit area.

Symbol: e_b

Measurement: Heat Flux DensityUnit: W/m²

Note: Value can be positive or negative.

Formulas to find Black Body Radiant Emittance

Temperature

Temperature is the degree or intensity of heat present in a substance or object.

Symbol: T

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Temperature

Stefan-Boltzmann Constant

Stefan-Boltzmann Constant relates the total energy radiated by a perfect black body to its temperature and is fundamental in understanding blackbody radiation and astrophysics.

Symbol: [Stefan-BoltZ]

Value: 5.670367E-8

Other formulas in Thermal Parameters category

Go Saturated Mixture Specific Enthalpy

h = h f + χ \cdot h fg

Go Sensible Heat Factor

SHF = \frac{SH}{SH + LH}

Go Specific Heat

c = Q \cdot m \cdot ΔT

Go Specific Heat at Constant Volume

C vm = \frac{ΔQ}{N m \cdot ΔT}

How to Evaluate Stefan Boltzmann Law?

Stefan Boltzmann Law evaluator uses Black Body Radiant Emittance = [Stefan-BoltZ]*Temperature^(4) to evaluate the Black Body Radiant Emittance, Stefan Boltzmann law that the total radiation emitted by a black body is proportional to the fourth power of its absolute temperature. Black Body Radiant Emittance is denoted by e_b symbol.

How to evaluate Stefan Boltzmann Law using this online evaluator? To use this online evaluator for Stefan Boltzmann Law, enter Temperature (T) and hit the calculate button.

FAQs on Stefan Boltzmann Law

What is the formula to find Stefan Boltzmann Law?

The formula of Stefan Boltzmann Law is expressed as Black Body Radiant Emittance = [Stefan-BoltZ]*Temperature^(4). Here is an example- 2.959967 = [Stefan-BoltZ]*85^(4).

How to calculate Stefan Boltzmann Law?

With Temperature (T) we can find Stefan Boltzmann Law using the formula - Black Body Radiant Emittance = [Stefan-BoltZ]*Temperature^(4). This formula also uses Stefan-Boltzmann Constant .

Can the Stefan Boltzmann Law be negative?

Yes, the Stefan Boltzmann Law, measured in Heat Flux Density can be negative.

Which unit is used to measure Stefan Boltzmann Law?

Stefan Boltzmann Law is usually measured using the Watt per Square Meter[W/m²] for Heat Flux Density. Kilowatt per Square Meter[W/m²], Watt per Square Centimeter[W/m²], Watt per Square Inch[W/m²] are the few other units in which Stefan Boltzmann Law can be measured.

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