1638.
Hans and Zacharias Janssen invented the first compound microscope.They did not discover it.
by a frog
Combined too convex lenses within a tube, thus constructing the forerunner of the compound microscope
they did something about cells......I think -1950. Dutch eyeglass makers, such as Zacharias Janssen ( exact dates unknown ), invent the first compound microscopes, by lining up two lenses to produce extra-large images.
Hans janssens
1590
Zacharias Jansen and his father Hans Lippershay in 1959
It is believed that Zacharias Jansen's father, Hans, helped him build the first microscope in 1595.
It is thought that Zacharias Jansen's father, Hans, helped him build the first microscope in 1595
The inventor of the microscope is typically credited to Dutch spectacle maker Zacharias Janssen around 1590. However, Hans Lippershey and Hans Jansen are also sometimes associated with the invention of the microscope.
Zacharias Jansen, a Dutch spectacle-maker, is credited with inventing the first compound microscope along with his father, Hans Jansen. They likely only created a few microscopes during their lifetime, and the exact number is not known.
The compound microscope was invented by Zacharias Janssen in the late 16th century, although others like Hans and Zacharias Janssen, Hans Lippershey, and Hans Martens claim to have contributed to its development. The electron microscope was later invented in the 20th century by Ernst Ruska and Max Knoll.
It is widely believed that Dutch spectacle makers, Zacharias Jansen and his father Hans were responsible for this invention. This was in the late 16th century.
actually no one invented them but they were discovered in in Holland around 1590 by Hans and Zacharias Jansen.
1638.
Zacharias Jansen is believed to have received his education in the Netherlands. However, there is limited historical evidence available on his educational background.