to look in to a slice of cork
Leeuwenhoek used a single-lens microscope that he designed himself. This powerful magnifying lens allowed him to observe bacteria for the first time in history.
Anton van Leeuwenhoek I think.
Anton Van Leeuwenhoek
Antonie van Leeuwenhoek used a simple microscope with a single lens that he crafted himself, often referred to as a van Leeuwenhoek microscope. Robert Hooke used a compound microscope, which includes multiple lenses to magnify the image.
Who is first use a words of micro economics & macro economics
Antonie van Leeuwenhoek
In 1670, Antonie van Leeuwenhoek used a microscope to describe cells in a drop of pond water. He made his own fine quality lens for use in monocular microscopes, and he was the first person to observe bacteria and protozoa. Some of his lenses could magnify objects up to 250X.
Antonie Van Leeuwenhoek is the first who observe the tiny, unicellular living things but Robert Hooke is the one who confirmed Leeuwenhoek's observations and was the first to use the term cell..
There is no apparent connection between van Leeuwenhoek who developed his simple (single lens) microscope system and the work of Zacharias Janssen is associated with the compound (two lens) microscope invented in 1590. Van Leeuwenhoek was unable to use the compound microscope because magnification was too low. The microscopes built by van Leeuwenhoek (around 1670) had ten times the magnification of the compound microscopes of the day. One could say that Janssen helped van Leeuwenhoek succeed by getting everyone else to use the inferior microscope.
antonie van leeuwenhoek
Anton van Leeuwenhoek used simple microscopes with a single convex lens to magnify blood and other specimens. His microscopes had very high-quality glass lenses that could achieve magnifications of up to 300 times. This allowed him to observe and describe various microorganisms and cells in detail, laying the groundwork for microbiology.
The lens that you should use to first look at a slide on a microscope is a low power lens then move on to a higher power for more clarity.