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Absorptivity Formula

GoAbsorptivity using Reflectivity and Transmissivity Formula

GoAbsorptivity using Reflectivity for Opaque Surface Formula

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Absorptivity is the fraction of incident radiation flux absorbed by the body. Check FAQs

α = \frac{G abs}{G}

α - Absorptivity?G_abs - Absorbed Radiation?G - Incident Radiation?

Absorptivity Example

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With units

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Here is how the Absorptivity equation looks like with Values.

Here is how the Absorptivity equation looks like with Units.

Here is how the Absorptivity equation looks like.

0.4333 = \frac{260}{600}

0.4333 = \frac{260W/m²}{600W/m²}

0.4333 = \frac{260}{600}

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Absorptivity Solution

Follow our step by step solution on how to calculate Absorptivity?

FIRST Step Consider the formula

α = \frac{G abs}{G}

Next Step Substitute values of Variables

∴

α = \frac{260W/m²}{600W/m²}

Next Step Prepare to Evaluate

∴

α = \frac{260}{600}

Next Step Evaluate

∴

α = 0.433333333333333

LAST Step Rounding Answer

∴

α = 0.4333

Absorptivity Formula Elements

Variables

Absorptivity

Absorptivity is the fraction of incident radiation flux absorbed by the body.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Absorptivity

Absorbed Radiation

Absorbed radiation is the amount of radiation energy absorbed by the body per its unit surface area.

Symbol: G_abs

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Absorbed Radiation

Incident Radiation

Incident radiation is the amount of radiation flux incident on a surface.

Symbol: G

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Incident Radiation

Other Formulas to find Absorptivity

Go Absorptivity using Reflectivity and Transmissivity

α = 1 - ρ - τ

Go Absorptivity using Reflectivity for Opaque Surface

α = 1 - ρ

Other formulas in Absorptivity, Reflectivity and Transmissivity category

Go Absorbed Radiation using Absorptivity and Incident Radiation

G abs = α \cdot G

Go Absorbed Radiation using Incident, Reflected and Transmitted Radiation

G abs = G - G ref - G tr

Go Incident Radiation using Absorbed, Reflected and Transmitted Radiation

G = G abs + G ref + G tr

Go Incident Radiation using Absorptivity and Absorbed Energy

G = \frac{G abs}{α}

How to Evaluate Absorptivity?

Absorptivity evaluator uses Absorptivity = Absorbed Radiation/Incident Radiation to evaluate the Absorptivity, Absorptivity formula is defined as a measure of the amount of radiation absorbed by a substance, describing the ability of a material to absorb radiation energy, which is essential in understanding the interaction between radiation and matter in various fields such as physics, chemistry, and biology. Absorptivity is denoted by α symbol.

How to evaluate Absorptivity using this online evaluator? To use this online evaluator for Absorptivity, enter Absorbed Radiation (G_abs) & Incident Radiation (G) and hit the calculate button.

FAQs on Absorptivity

What is the formula to find Absorptivity?

The formula of Absorptivity is expressed as Absorptivity = Absorbed Radiation/Incident Radiation. Here is an example- 0.433333 = 260/600.

How to calculate Absorptivity?

With Absorbed Radiation (G_abs) & Incident Radiation (G) we can find Absorptivity using the formula - Absorptivity = Absorbed Radiation/Incident Radiation.

What are the other ways to Calculate Absorptivity?

Here are the different ways to Calculate Absorptivity-

Absorptivity=1-Reflectivity-Transmissivity
Absorptivity=1-Reflectivity

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