Cells range in size:
The human eye can see objects as small as around 0.05 mm. A microscope is required to see cells in any detail.
In most microscopes, there is a choice of objective lenses to use. Magnification can be varied according to the size of the specimen and the level of detail required.
The magnification of a lens is shown by a multiplication sign followed by the amount the lens magnifies, eg ×10.
So, if the magnification of an eyepiece is ×10 and the objective is ×4, the magnification of the microscope is:
magnification of eyepiece × magnification of objective
= 10 × 4
If the magnification of an eyepiece is ×10 and the objective is ×40, what is the magnification of the microscope?
Microscopes use lenses to magnify the image of a biological specimen so that it appears larger.
The formula to calculate magnification is: