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How did electron microscopes confirm the existence of the Golgi apparatus in the 1950s?

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Diagram of the Golgi apparatus showing its stacked, curved membranes with labeled parts including cisternae, cis face, trans face, lumen, and various vesicles involved in cellular transport and secretion. — Golgi apparatus A membrane-bound organelle of eukaryotic cells, the Golgi apparatus is made up of a series of flattened, stacked pouches called cisternae that function as a series of compartments that progressively refine and direct cellular products to their proper destinations. .

The initial observation of the Golgi apparatus by Camillo Golgi in 1897 was met with skepticism, as many scientists believed the structure was merely an artifact caused by the metal-based staining technique he used.12

The existence of the organelle was definitively confirmed in the 1950s with the advent of the electron microscope. Unlike light microscopy, which lacked the necessary resolution to clearly define such small cellular structures, electron microscopy provided the high resolving power required to visualize the organelle's internal architecture. By allowing researchers to observe the fine, membrane-bound structure of the cisternae directly, this technology proved that the Golgi apparatus was a real, physical component of the cell rather than a staining byproduct.123