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The first microscope was constructed by Antony van Leeuwenhoek in 1632-1723. His microscopes used single biconvex lens & were called simple microscopes. It had a considerable magnifying power up to 200 times.

Robert hooke in 1635-1703, an English scientist, developed a microscope by using two lenses or achieving greater magnification. Such microscopes were later known as compound microscopes which magnifies an object up to a maximum of about 2000 times. He first examined a thin slice of cork under his microscope & observed that it was made of tiny boxlike compartments piled up together. This reminded him of the rooms, or cells, of monks in a monastery & so he said that the cork was made up of cells. The cells that he examined were all dead cells & they had only empty boxes or the walls.

The invention of electronic microscope added further to the unknown facts about cells. It gave a magnification to over 200,000 times. It uses beams of electrons which are bent by magnets.

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14y ago

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