Emissivity of Medium given Emissive Power of Blackbody through Medium Calculator

✖Radiosity for Transparent Medium represents the rate at which radiation energy leaves a unit area of a surface in all directions.ⓘ Radiosity for Transparent Medium [J_m]			+10% -10%
✖Emissive Power of Blackbody through Medium is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.ⓘ Emissive Power of Blackbody through Medium [E_bm]			+10% -10%

✖Emissivity of Medium is the ratio of the energy radiated from medium surface to that radiated from a perfect emitter.ⓘ Emissivity of Medium given Emissive Power of Blackbody through Medium [ε_m]

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Emissivity of Medium given Emissive Power of Blackbody through Medium

Formula

`"ε"_{"m"} = "J"_{"m"}/"E"_{"bm"}`

Example

`"0.943396"="250W/m²"/"265W/m²"`

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Emissivity of Medium given Emissive Power of Blackbody through Medium Solution

STEP 0: Pre-Calculation Summary

Formula Used

Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium
ε_m = J_m/E_bm
This formula uses 3 Variables

Variables Used

Emissivity of Medium - Emissivity of Medium is the ratio of the energy radiated from medium surface to that radiated from a perfect emitter.
Radiosity for Transparent Medium - (Measured in Watt per Square Meter) - Radiosity for Transparent Medium represents the rate at which radiation energy leaves a unit area of a surface in all directions.
Emissive Power of Blackbody through Medium - (Measured in Watt per Square Meter) - Emissive Power of Blackbody through Medium is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.

STEP 1: Convert Input(s) to Base Unit

Radiosity for Transparent Medium: 250 Watt per Square Meter --> 250 Watt per Square Meter No Conversion Required
Emissive Power of Blackbody through Medium: 265 Watt per Square Meter --> 265 Watt per Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

ε_m = J_m/E_bm --> 250/265

Evaluating ... ...

ε_m = 0.943396226415094

STEP 3: Convert Result to Output's Unit

0.943396226415094 --> No Conversion Required

FINAL ANSWER

0.943396226415094 ≈ 0.943396 <-- Emissivity of Medium

(Calculation completed in 00.004 seconds)

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University School of Chemical Technology-USCT (GGSIPU), New Delhi

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< 8 Radiation System consisting of Transmitting and Absorbing Medium between Two Planes. Calculators

Transmissivity of Transparent Medium given Radiosity and Shape Factor

Go Transmissivity of Transparent Medium = Radiation Heat Transfer/(Surface Area of Body 1*Radiation Shape Factor 12*(Radiosity of 1st Body-Radiosity of 2nd Body))

Net Heat Exchange in Transmission Process

Go Radiation Heat Transfer = Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium*(Radiosity of 1st Body-Radiosity of 2nd Body)

Energy Leaving Surface 1 that is Transmitted through Medium

Go Energy Leaving Surface = Radiosity of 1st Body*Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium

Emissive Power of Blackbody through Medium given Emissivity of Medium

Go Emissive Power of Blackbody through Medium = Radiosity for Transparent Medium/Emissivity of Medium

Emissivity of Medium given Emissive Power of Blackbody through Medium

Go Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium

Energy Emitted by Medium

Go Radiosity for Transparent Medium = Emissivity of Medium*Emissive Power of Blackbody through Medium

Temperature of Medium given Emissive Power of Blackbody

Go Temperature of Medium = (Emissive Power of Blackbody through Medium/[Stefan-BoltZ])^(1/4)

Emissive Power of Blackbody through Medium

Go Emissive Power of Blackbody through Medium = [Stefan-BoltZ]*(Temperature of Medium^4)

< 21 Important Formulas in Gas Radiation, Radiation Exchange with Specular Surfaces & more Special Cases Calculators

Net Heat Lost by Surface given Diffuse Radiosity

Go Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)

Transmissivity of Transparent Medium given Radiosity and Shape Factor

Go Transmissivity of Transparent Medium = Radiation Heat Transfer/(Surface Area of Body 1*Radiation Shape Factor 12*(Radiosity of 1st Body-Radiosity of 2nd Body))

Net Heat Exchange in Transmission Process

Go Radiation Heat Transfer = Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium*(Radiosity of 1st Body-Radiosity of 2nd Body)

Diffuse Radiation Exchange from Surface 1 to Surface 2

Go Heat Transfer from Surface 1 to 2 = (Diffuse Radiosity for Surface 1*Surface Area of Body 1*Radiation Shape Factor 12)*(1-Specular Component of Reflectivity of Surface 2)

Diffuse Radiation Exchange from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1)

Energy Leaving Surface 1 that is Transmitted through Medium

Go Energy Leaving Surface = Radiosity of 1st Body*Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium

Net Heat Lost by Surface

Go Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))

Radiation Intensity at given Distance using Beer's Law

Go Radiation Intensity at Distance x = Initial Radiation Intensity*exp(-(Monochromatic Absorption Coefficient*Distance))

Initial Radiation Intensity

Go Initial Radiation Intensity = Radiation Intensity at Distance x/exp(-(Monochromatic Absorption Coefficient*Distance))

Diffuse Radiosity

Go Diffuse Radiosity = ((Emissivity*Emissive Power of Blackbody)+(Diffuse Component of Reflectivity*Irradiation))

Direct Diffuse Radiation from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body

Monochromatic Transmissivity

Go Monochromatic Transmissivity = exp(-(Monochromatic Absorption Coefficient*Distance))

Emissive Power of Blackbody through Medium given Emissivity of Medium

Go Emissive Power of Blackbody through Medium = Radiosity for Transparent Medium/Emissivity of Medium

Emissivity of Medium given Emissive Power of Blackbody through Medium

Go Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium

Energy Emitted by Medium

Go Radiosity for Transparent Medium = Emissivity of Medium*Emissive Power of Blackbody through Medium

Temperature of Medium given Emissive Power of Blackbody

Go Temperature of Medium = (Emissive Power of Blackbody through Medium/[Stefan-BoltZ])^(1/4)

Transmissivity given Specular and Diffuse Component

Go Transmissivity = (Specular Component of Transmissivity+Diffuse Component of Transmissivity)

Emissive Power of Blackbody through Medium

Go Emissive Power of Blackbody through Medium = [Stefan-BoltZ]*(Temperature of Medium^4)

Reflectivity given Specular and Diffuse Component

Go Reflectivity = Specular Component of Reflectivity+Diffuse Component of Reflectivity

Monochromatic Absorption Coefficient if Gas is Non-Reflecting

Go Monochromatic Absorption Coefficient = 1-Monochromatic Transmissivity

Monochromatic Transmissivity if Gas is Non Reflecting

Go Monochromatic Transmissivity = 1-Monochromatic Absorption Coefficient

Emissivity of Medium given Emissive Power of Blackbody through Medium Formula

Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium
ε_m = J_m/E_bm

What is Radiation?

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

What is Emissivity?

Emissivity is defined as the ratio of the energy radiated from a material's surface to that radiated from a perfect emitter, known as a blackbody, at the same temperature and wavelength and under the same viewing conditions. It is a dimensionless number between 0 (for a perfect reflector) and 1 (for a perfect emitter).

How to Calculate Emissivity of Medium given Emissive Power of Blackbody through Medium?

Emissivity of Medium given Emissive Power of Blackbody through Medium calculator uses Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium to calculate the Emissivity of Medium, The Emissivity of Medium given Emissive Power of Blackbody through Medium formula is defined as the function of Radiosity and emissive power of blackbody. The emissive power of a body is defined as the ratio of energy emitted (or radiated) per unit area per second to the amount of heat energy emitted per unit area per second by a perfectly black body at the same temperature. When a body’s temperature rises above absolute zero, it emits heat, which is referred to as emission. When this emitted heat travels in the form of an electromagnetic wave, it is referred to as thermal radiation. At any given temperature, this power is the energy of thermal radiation emitted in all directions per unit time per unit area of a surface. Emissivity of Medium is denoted by ε_m symbol.

How to calculate Emissivity of Medium given Emissive Power of Blackbody through Medium using this online calculator? To use this online calculator for Emissivity of Medium given Emissive Power of Blackbody through Medium, enter Radiosity for Transparent Medium (J_m) & Emissive Power of Blackbody through Medium (E_bm) and hit the calculate button. Here is how the Emissivity of Medium given Emissive Power of Blackbody through Medium calculation can be explained with given input values -> 0.943396 = 250/265.

FAQ

What is Emissivity of Medium given Emissive Power of Blackbody through Medium?

The Emissivity of Medium given Emissive Power of Blackbody through Medium formula is defined as the function of Radiosity and emissive power of blackbody. The emissive power of a body is defined as the ratio of energy emitted (or radiated) per unit area per second to the amount of heat energy emitted per unit area per second by a perfectly black body at the same temperature. When a body’s temperature rises above absolute zero, it emits heat, which is referred to as emission. When this emitted heat travels in the form of an electromagnetic wave, it is referred to as thermal radiation. At any given temperature, this power is the energy of thermal radiation emitted in all directions per unit time per unit area of a surface and is represented as ε_m = J_m/E_bm or Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium. Radiosity for Transparent Medium represents the rate at which radiation energy leaves a unit area of a surface in all directions & Emissive Power of Blackbody through Medium is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.

How to calculate Emissivity of Medium given Emissive Power of Blackbody through Medium?

The Emissivity of Medium given Emissive Power of Blackbody through Medium formula is defined as the function of Radiosity and emissive power of blackbody. The emissive power of a body is defined as the ratio of energy emitted (or radiated) per unit area per second to the amount of heat energy emitted per unit area per second by a perfectly black body at the same temperature. When a body’s temperature rises above absolute zero, it emits heat, which is referred to as emission. When this emitted heat travels in the form of an electromagnetic wave, it is referred to as thermal radiation. At any given temperature, this power is the energy of thermal radiation emitted in all directions per unit time per unit area of a surface is calculated using Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium. To calculate Emissivity of Medium given Emissive Power of Blackbody through Medium, you need Radiosity for Transparent Medium (J_m) & Emissive Power of Blackbody through Medium (E_bm). With our tool, you need to enter the respective value for Radiosity for Transparent Medium & Emissive Power of Blackbody through Medium and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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