if you are looking a something in a microscope like a sperm cell how would you determain its size?

Question

if you are looking a something in a microscope like a sperm cell how would you determain its size?

Answer 1

In most cases you would start with a slide with something of known size. Often this will be a slide with markings on it at known intervals. Once you calibrate your microscope's image to the known distance you can easily estimate the size of unknown objects. This can be simplified by also having an eyepiece that contains a built-in ruler.

Answer 2

Using a very specific mesh slide you can determine the size of every microscopic object

Answer 3

by using a micrometer. it's an etched "ruler" that's inserted into the eyepiece of the microscope, and is calibrated to that specific microscope. you can then measure the cell in microns.

Answer 4

each microscope has its magnifying power ( 1000 times..etc)
and you can calculate.
Mostly you may see things inside circle shape (viewer shape)
and sizes of individual things can be determined.