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Reflectivity of Material Formula

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Material Reflectivity is the ratio of amount of radiation that is reflected to the total radiation incident. Check FAQs

R = 1 - \frac{s \cdot V \cdot (c \cdot (T m - θ ambient) + L fusion) \cdot 4.2}{Q}

R - Material Reflectivity?s - Specific Gravity of Material?V - Volume of Metal Melted?c - Specific Heat Capacity?T_m - Melting Temperature of Base Metal?θ_ambient - Ambient Temperature?L_fusion - Latent Heat of Fusion?Q - Heat Energy?

Reflectivity of Material Example

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Here is how the Reflectivity of Material equation looks like with Values.

Here is how the Reflectivity of Material equation looks like with Units.

Here is how the Reflectivity of Material equation looks like.

0.5 = 1 - \frac{2.4 \cdot 0.04 \cdot (0.421 \cdot (1499.999 - 55.02) + 4599.997) \cdot 4.2}{4200}

0.5 = 1 - \frac{2.4 \cdot 0.04m³ \cdot (0.421J/kg*°C \cdot (1499.999°C - 55.02°C) + 4599.997J/kg) \cdot 4.2}{4200J}

0.5 = 1 - \frac{2.4 \cdot 0.04 \cdot (0.421 \cdot (1499.999 - 55.02) + 4599.997) \cdot 4.2}{4200}

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Reflectivity of Material Solution

Follow our step by step solution on how to calculate Reflectivity of Material?

FIRST Step Consider the formula

R = 1 - \frac{s \cdot V \cdot (c \cdot (T m - θ ambient) + L fusion) \cdot 4.2}{Q}

Next Step Substitute values of Variables

∴

R = 1 - \frac{2.4 \cdot 0.04m³ \cdot (0.421J/kg*°C \cdot (1499.999°C - 55.02°C) + 4599.997J/kg) \cdot 4.2}{4200J}

Next Step Convert Units

∴

R = 1 - \frac{2.4 \cdot 0.04m³ \cdot (0.421J/(kg*K) \cdot (1773.149K - 328.17K) + 4599.997J/kg) \cdot 4.2}{4200J}

Next Step Prepare to Evaluate

∴

R = 1 - \frac{2.4 \cdot 0.04 \cdot (0.421 \cdot (1773.149 - 328.17) + 4599.997) \cdot 4.2}{4200}

Next Step Evaluate

∴

R = 0.500000016736

LAST Step Rounding Answer

∴

R = 0.5

Reflectivity of Material Formula Elements

Variables

Material Reflectivity

Material Reflectivity is the ratio of amount of radiation that is reflected to the total radiation incident.

Symbol: R

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Material Reflectivity

Specific Gravity of Material

Specific Gravity of Material is a dimensionless unit defined as the ratio of the density of the material to the density of water at a specified temperature.

Symbol: s

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Specific Gravity of Material

Volume of Metal Melted

Volume of Metal Melted is defined as the volume of the material removed during the process of Laser Beam Machining.

Symbol: V

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Volume of Metal Melted

Specific Heat Capacity

Specific Heat Capacity is the heat required to raise the temperature of the unit mass of a given substance by a given amount.

Symbol: c

Measurement: Specific Heat CapacityUnit: J/kg*°C

Note: Value can be positive or negative.

Formulas to find Specific Heat Capacity

Melting Temperature of Base Metal

Melting Temperature of Base Metal is the temperature at which its phase changes from liquid to solid.

Symbol: T_m

Measurement: TemperatureUnit: °C

Note: Value should be greater than 0.

Formulas to find Melting Temperature of Base Metal

Ambient Temperature

Ambient temperature refers to the air temperature of any object or environment where equipment is stored. In a more general sense, it is the temperature of the surrounding environment.

Symbol: θ_ambient

Measurement: TemperatureUnit: °C

Note: Value can be positive or negative.

Formulas to find Ambient Temperature

Latent Heat of Fusion

The Latent Heat of Fusion is the amount of heat required to convert one unit amount of substance from the solid phase to the liquid phase — leaving the temperature of the system unaltered.

Symbol: L_fusion

Measurement: Latent HeatUnit: J/kg

Note: Value should be greater than 0.

Formulas to find Latent Heat of Fusion

Heat Energy

Heat Energy is the form of energy that is transferred between systems with different temperatures. It flows from the hotter system to the cooler one until thermal equilibrium is reached.

Symbol: Q

Measurement: EnergyUnit: J

Note: Value should be greater than 0.

Formulas to find Heat Energy

Other formulas in Energy Requirements in LBM category

Go Energy Required to Melt Metal in LBM

Q = \frac{ρ m \cdot V \cdot (c \cdot (T m - θ ambient) + L fusion)}{1 - R}

Go Specific Gravity of given Metal

s = \frac{Q \cdot (1 - R)}{V \cdot (c \cdot (T m - θ ambient) + L fusion) \cdot 4.2}

How to Evaluate Reflectivity of Material?

Reflectivity of Material evaluator uses Material Reflectivity = 1-(Specific Gravity of Material*Volume of Metal Melted*(Specific Heat Capacity*(Melting Temperature of Base Metal-Ambient Temperature)+Latent Heat of Fusion)*4.2)/Heat Energy to evaluate the Material Reflectivity, The Reflectivity of Material formula is defined as ratio of amount of radiation that is reflected to total radiation incident. Material Reflectivity is denoted by R symbol.

How to evaluate Reflectivity of Material using this online evaluator? To use this online evaluator for Reflectivity of Material, enter Specific Gravity of Material (s), Volume of Metal Melted (V), Specific Heat Capacity (c), Melting Temperature of Base Metal (T_m), Ambient Temperature (θ_ambient), Latent Heat of Fusion (L_fusion) & Heat Energy (Q) and hit the calculate button.

FAQs on Reflectivity of Material

What is the formula to find Reflectivity of Material?

The formula of Reflectivity of Material is expressed as Material Reflectivity = 1-(Specific Gravity of Material*Volume of Metal Melted*(Specific Heat Capacity*(Melting Temperature of Base Metal-Ambient Temperature)+Latent Heat of Fusion)*4.2)/Heat Energy. Here is an example- 0.5 = 1-(2.4*0.04*(0.421*(1773.149-328.17)+4599.997)*4.2)/4200.

How to calculate Reflectivity of Material?

With Specific Gravity of Material (s), Volume of Metal Melted (V), Specific Heat Capacity (c), Melting Temperature of Base Metal (T_m), Ambient Temperature (θ_ambient), Latent Heat of Fusion (L_fusion) & Heat Energy (Q) we can find Reflectivity of Material using the formula - Material Reflectivity = 1-(Specific Gravity of Material*Volume of Metal Melted*(Specific Heat Capacity*(Melting Temperature of Base Metal-Ambient Temperature)+Latent Heat of Fusion)*4.2)/Heat Energy.

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Reflectivity of Material Formula

Reflectivity of Material Example

Reflectivity of Material Solution

Reflectivity of Material Formula Elements

Other formulas in Energy Requirements in LBM category

How to Evaluate Reflectivity of Material?

FAQs on Reflectivity of Material

Variable Name