magnification = size of image / size of real object
An electron microscope has much higher magnification and resolving power than a light microscope. This means that it can be used to study cells in much finer detail. This has enabled biologists to see and understand many more sub-cellular structures
how electron microscopy has increased understanding of sub-cellular structures:
as they have a greater magnification capacity.
a higher resolution
greater resolving power compared to light microscopes