Radiant power incident

Radiant power incident on Po Rydberg, unit of energy Ry... 

Laws of Photometry. The time rate at which energy is transported in a beam of radiant energy is denoted by the symbol To for the incident beam, and by P for the quantity remaining unabsorbed after passage through a sample or container. The ratio of radiant power transmitted by the sample to the radiant power incident on the sample is the transmittance T ... 

A dimensionless quantity, symbolized by t or T, equal to the transmitted radiant power, Ptr, divided by the radiant power incident on the sample, Po thus, t = Ptr/ Pq. It is a measure of the ability of a body, solution, entity, eta, to transmit electromagnetic radiation. It is synonymous with transmission factor. See also Internal Transmittance Transmission Density Total Transmittance Beer-Lambert Law Absorption Spectroscopy... 

Transmittance (T) Ratio of radiant power transmitted by sample to radiant power incident to it Absorbance (A) Logarithm to the base 10 of the reciprocal of the transmittance Absorptivity (a) Ratio of the absorbance to the product of the concentration and the length of the optical path. (If only one cell is used for all the work, the path length will be constant and can be left out of all ealens without introducing an e rror. To simplify the ealen, all measurements were made with the same 0.209mm cell. Hence, all the absorptivities were referred to a 0.209mm [ basis)... 

A= Absorbance = logj0l/T(T is Transmittance - ratio of radiant power transmitted by sample to radiant power incident to it) and a a -Mean Absorptivity of above compound... 

Band intensities are expressed as either transmittance (T) or absorbance (A). Transmittance is the ratio of the radiant power transmitted by a sample to the radiant power incident on the sample. Absorbance is the base 10 logarithm of the reciprocals of the transmittance A = logi0T. Quantitative measurements in the infrared usually begin with Beer s law and its analogs ... 

The radiant power incident on a surface per unit area is called the irradiation G. Diffuse irradiation refers to the condition when the incident radiation is uniformly distributed in all directions, i.e., the incoming intensity is independent of the direction. 

Ratio of radiant power transmitted by a sample to the radiant power incident on the sample Distance between two points on adjacent waves that are in phase... 

P = radiant power passing through the sample, and P = radiant power incident upon the sample. 

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