Spectral Reflection Factor Calculator

✖Reflected Spectral Emission refer to light that is reflected from a surface after being modified by the spectral properties of the surface itself.ⓘ Reflected Spectral Emission [J_λ]			+10% -10%
✖Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.ⓘ Spectral Irradiation [G_λ]			+10% -10%

✖Spectral Reflection Factor at a wave length λ.ⓘ Spectral Reflection Factor [P_λ]

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Formula

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Spectral Reflection Factor

Formula

`"P"_{"λ"} = "J"_{"λ"}/"G"_{" λ"}`

Example

`"1.304348"="4.5"/"3.45"`

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Spectral Reflection Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation
P_λ = J_λ/G_λ
This formula uses 3 Variables

Variables Used

Spectral Reflection Factor - Spectral Reflection Factor at a wave length λ.
Reflected Spectral Emission - Reflected Spectral Emission refer to light that is reflected from a surface after being modified by the spectral properties of the surface itself.
Spectral Irradiation - Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.

STEP 1: Convert Input(s) to Base Unit

Reflected Spectral Emission: 4.5 --> No Conversion Required
Spectral Irradiation: 3.45 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_λ = J_λ/G_λ --> 4.5/3.45

Evaluating ... ...

P_λ = 1.30434782608696

STEP 3: Convert Result to Output's Unit

1.30434782608696 --> No Conversion Required

FINAL ANSWER

1.30434782608696 ≈ 1.304348 <-- Spectral Reflection Factor

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electrical » Utilization of Electrical Energy » Illumination » Methods of Lighting » Spectral Reflection Factor

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Created by Aman Dhussawat

GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

Aman Dhussawat has created this Calculator and 50+ more calculators!

Verified by Parminder Singh

Chandigarh University (CU), Punjab

Parminder Singh has verified this Calculator and 600+ more calculators!

< 6 Methods of Lighting Calculators

Intensity of Light Transmitted

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption Coefficient*Path Length)

Number of Floodlighting Units

Go Number of Floodlighting Units = (Area to be Lighted*Illumination Intensity)/(0.7*Lumen Flux)

Spectral Transmission Factor

Go Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation

Spectral Reflection Factor

Go Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation

Spectral Luminous Efficacy

Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

Luminance for Lambertian Surfaces

Go Luminance = Illumination Intensity/pi

< 16 Advanced Illumination Calculators

Beer-Lambert Law

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption per Concentration Coefficient*Concentration of Absorption Material*Path Length)

Fresnel's Law of Reflection

Go Reflection Loss = (Refractive Index of Medium 2-Refractive Index of Medium 1)^2/(Refractive Index of Medium 2+Refractive Index of Medium 1)^2

Refracted Angle using Snell's Law

Go Refracted Angle = arcsinh((Refractive Index of Medium 1*sin(Incident Angle))/(Refractive Index of Medium 2))

Incident Angle using Snell's Law

Go Incident Angle = arcsinh((Refractive Index of Medium 2*sin(Refracted Angle))/(Refractive Index of Medium 1))

Intensity of Light Transmitted

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption Coefficient*Path Length)

Illumination by Lambert Cosine Law

Go Illumination Intensity = (Luminous Intensity*cos(Illumination Angle))/(Length of Illumination^2)

Number of Floodlighting Units

Go Number of Floodlighting Units = (Area to be Lighted*Illumination Intensity)/(0.7*Lumen Flux)

Lambert's Cosine Law

Go Illuminance at Angle of Incidence = Illumination Intensity*cos(Incident Angle)

Spectral Transmission Factor

Go Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation

Spectral Reflection Factor

Go Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation

Utilization Factor of Electrical Energy

Go Utilization Factor = Lumen Reaching Working Plane/Lumen Emitting from Source

Spectral Luminous Efficacy

Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

Inverse Square Law

Go Luminance = Intensity of Transmitted Light/Distance^2

Specific Consumption

Go Specific Consumption = (2*Input Power)/Candle Power

Luminance for Lambertian Surfaces

Go Luminance = Illumination Intensity/pi

Luminous Intensity

Go Luminous Intensity = Lumen/Solid Angle

Spectral Reflection Factor Formula

Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation
P_λ = J_λ/G_λ

What is luminous reflectance factor?

The LRF is defined as the colour contrast between two material surfaces, and is calculated by mathematical formula that uses the LRV's of each material. As a general rule, the LRF will not be meaningful insofar as a Dryvit application is concerned.

How to Calculate Spectral Reflection Factor?

Spectral Reflection Factor calculator uses Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation to calculate the Spectral Reflection Factor, The Spectral Reflection Factor formula is defined as the ratio of the radiation reflected from a surface to the radiation incident on that surface. Spectral Reflection Factor is denoted by P_λ symbol.

How to calculate Spectral Reflection Factor using this online calculator? To use this online calculator for Spectral Reflection Factor, enter Reflected Spectral Emission (J_λ) & Spectral Irradiation (G_λ) and hit the calculate button. Here is how the Spectral Reflection Factor calculation can be explained with given input values -> 1.304348 = 4.5/3.45.

FAQ

What is Spectral Reflection Factor?

The Spectral Reflection Factor formula is defined as the ratio of the radiation reflected from a surface to the radiation incident on that surface and is represented as P_λ = J_λ/G_λ or Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation. Reflected Spectral Emission refer to light that is reflected from a surface after being modified by the spectral properties of the surface itself & Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.

How to calculate Spectral Reflection Factor?

The Spectral Reflection Factor formula is defined as the ratio of the radiation reflected from a surface to the radiation incident on that surface is calculated using Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation. To calculate Spectral Reflection Factor, you need Reflected Spectral Emission (J_λ) & Spectral Irradiation (G_λ). With our tool, you need to enter the respective value for Reflected Spectral Emission & Spectral Irradiation 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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