Mõõtmisprintsiip

Mõõtmisprintsiip refers to the fundamental physical or chemical phenomenon that underlies a particular measurement method. It dictates how a quantity is converted into a readable signal or value. For example, in a mercury thermometer, the mõõtmisprintsiip is the thermal expansion of mercury. As temperature increases, the mercury expands, and its volume change is directly related to the temperature.

Another example is in electrical measurements. Ohm's law, V=IR, serves as a mõõtmisprintsiip for measuring resistance. By applying a known voltage (V) and measuring the resulting current (I), resistance (R) can be calculated. Similarly, in spectroscopy, the absorption or emission of specific wavelengths of light by a substance is the mõõtmisprintsiip used to identify and quantify its presence.

The choice of mõõtmisprintsiip significantly influences the accuracy, precision, sensitivity, and range of a measurement. Different principles are suited for different types of quantities and applications. Understanding the underlying mõõtmisprintsiip is crucial for selecting the appropriate measuring instrument, interpreting the results correctly, and identifying potential sources of error. It forms the theoretical basis for all quantitative observations in science and engineering.