Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
Photoelectric colorimeter is a medical term. Essentially, it is referring to a colorimeter using a photoelectric cell and appropriate filters instead of the eye.
To use a colorimeter, start by calibrating the device according to the manufacturer's instructions. Then, insert the sample into the colorimeter and follow the prompts to measure the color of the sample. The colorimeter will display the results usually as numerical values or a color reading depending on the device.
By colour base
It is not something that was discovered, it was invented. One of the most popular designs is the Duboscq colorimeter which was invented by Jules Duboscq in 1870.
Typically a colorimeter has three filters. However, this can change depending on the company and type of colorimeter. For example our Gamma Scientific tri-stimulus colorimeter uses four extremely stable colored glass filters in conjunction with high quality silicon photodiodes for increased accuracy. This is done to more accurately match the CIE standard observer functions. These resources may be helpful if you have further colorimeter questions:
we are using blank because if we are not inserting anything in colorimeter and keeping it open then the light from the surrounding may affect it's absorbance causing damage
A colorimeter reading is a measurement of the absorbance or transmittance of light by a substance at a specific wavelength in order to determine its concentration or properties. Colorimeters are commonly used in chemistry, biochemistry, and environmental science to quantitatively analyze samples based on their color intensity.
A colorimeter could be used in a breathalyzer test to measure the intensity of color change that occurs when an alcohol-based sample is processed. The color change corresponds to the concentration of alcohol in the sample, allowing for quantitative analysis of blood alcohol content. This measurement can then be used to determine if a person is under the influence of alcohol.
A colorimeter measures the absorbance or transmittance of light across a certain range of visible wavelengths to determine the concentration of a specific colored compound in a solution. It compares the intensity of light before and after passing through the sample to quantify the color intensity. The data collected is typically used to generate a calibration curve relating color intensity to concentration.
A colorimeter measures the absorbance of a specific wavelength of light to determine the concentration of a substance in a sample based on the Beer-Lambert law, usually used in simpler color analysis. On the other hand, a spectrophotometer measures the intensity of light at multiple wavelengths across the UV-visible range, allowing for more detailed analysis of a sample's absorbance spectra or transmission characteristics. In essence, a spectrophotometer is more advanced and versatile compared to a colorimeter.
To calibrate a colorimeter, you would typically use a calibration standard or software provided by the manufacturer. This involves adjusting the device to ensure it accurately measures color in accordance with known reference values. Calibration is important to maintain the accuracy and reliability of color measurements.
A colorimeter measures the absorption of specific wavelengths of light to determine the concentration of a colored substance in a solution, while a turbidimeter measures the scattering of light by suspended particles in a liquid to determine the turbidity or cloudiness of the solution. Colorimeters are used for measuring color intensity, while turbidimeters are used for measuring suspended solids content.