Application Related
ABSORBANCE REFLECTANCE TRASMITTANCE

Absorbance, Reflectance and Transmittance
When a beam of light irradiates a sample, some of the light can be:
- absorbed. Absorption occurs when incident radiation is absorbed into the target.
- trasmitted. Transmission occurs when radiation passes through a target.
- reflected. Reflection occurs when radiation “bounces” off the target and is redirected.
Spherical receivers as Integrating spheres are often used for such measurements.
Absorbance:
When this occurs, the chemical sample is excited from a lower to a higher energy level.
To calculate absorbance the ratio of incident light to light transmitted through the sample is measured, therefore usually a monochromatic laser is used. The size of the peaks in an absorbance spectrum are proportional to concentration, therefore absorbance can be used for quantitative analysis.
Spectral Absorbance (A) was calculated as: Absorbance = 1- (Reflectance + Transmittance)
Absorbance
Reflectance and Transmittance:
Can be used to determine the chemical structure and properties of surface and surface-adsorbed species.
Reflectance measures the amount of light that reflects from the surface of a sample. The Reflectance describes how much light is reflected from a surface or optical element. It is equal to the ratio of reflected power and incident power when light is shot onto a surface.
Transmittance is the amount of light transmitted by a sample. The Transmittance describes how much light is transmitted from a surface or optical element. It is equal to the ratio of transmitted power and incident power when light is shot onto a surface. Trasmittance is mathematically related to absorbance.
Reflectance and Transmittance
Application tools
Here is a list of all the equipment for this applications.