Micrometery : Measuring the cell size by ocular micrometer and stage micrometer скачать в хорошем качестве

Micrometery : Measuring the cell size by ocular micrometer and stage micrometer

Measurement of the dimensions of cells is done under microscope with the help of two micro-scales called ‘micrometers’. Both the micrometers have microscopic graduations etched on their surfaces. One of them, the ‘ocular micrometer’ is a circular glass disc, which fits into the circular shelf inside the eyepiece. It has arbitrary graduations etched on its surface. However, the distance between the etched graduations is constant for a particular ocular micrometer. The other micrometer, called ‘stage micrometer’, is a special glass slide, which is clipped to the stage of the microscope. It has standard graduations etched on its surface, which are in general 10 µ apart.