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Q: When did zacharias janssen be a Dutch spectacle-maker of Middelburg?
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What was Zacharias Janssen contributions?

Zacharias Janssen was a Dutch spectacle-maker of Middelburg. Hans Janssen and his son Zacharias Janssen, Dutch spectacle-makers, are frequently cited as having invented the first compound microscope in 1590, but there is a good deal of dispute. They may not have. Zacharias Janssen was the one who actually made the claim, and in the middle of the 1600's. A number of historians, however, agree that it is imporbable that 1590 is correct. There is a good deal of evidence that Zacharias Janssen was born somewhere around 1590.


What nationality was Zacharias Janssen?

Dutch i think


Who are Hans and zacharias janssen?

They were dutch inventors. They were father and son. They made the first microscope.


What awards did zacharias janssen win?

Zacharias Janssen did not win any awards. He was a Dutch spectacle-maker who, along with his father Hans, is credited with the invention of the first compound microscope in the late 16th century.


What did Hans and Zacharias Janssen contribute to science?

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.


When did Zacharias Janssen invent the compound microscope?

Hans Janssen and his son Zacharias Janssen, Dutch spectacle-makers, are frequently cited as having invented the first compound microscope in 1590, but there is a good deal of dispute. They may not have. Zacharias Janssen was the one who actually made the claim, and in the middle of the 1600's. A number of historians, however, agree that it is imporbable that 1590 is correct. There is a good deal of evidence that Zacharias Janssen was born somewhere around 1590. A link is provided to the Wikipedia article on the optical microscope where a brief history of the device can be reviewed.


Who invent the light microscope?

The light microscope also called the optical microscope uses visibale light and a system of lenses. The actual inventor is difficult to name although Galileo's microscope was celebrated in 1624 and was the first such device to be given the name "microscope". There are claims that a Dutch spectacle-makers Hans Janssen and his son, Zacharias Janssen, but this was a declaration made by Zacharias Janssen himself during the mid 1600s.


What was the contribution from Hans and zacharias janssen to the cell theory?

In 1950, dutch eyeglass makers, Hans and Zacharias Janssen ( exact dates unknown ), invented the first compound microscopes, by lining up two lenses to produce extra-large images and in doing so they created the compound microscope. They were inventors of the first compound microscope in 1595, which allowed for more in depth studies of cells.


Who was the Dutch scientist who improved the microscope?

The first microscope to be developed was the optical microscope. An early microscope was made in 1590 in Middelburg, Netherlands. Two eyeglass makers are variously given credit: Hans Lippershey (who developed an early telescope) and Zacharias Janssen. Van Leeuwenhoek improved a microscope and first described cells seen in cork tissue. He called them cells as they looked like little rooms, similar to ones that monks lived in.


Who discovered microorganisms?

I don't know if there is a definite person, but the first person to invent a compound microscope was Dutch Hans Janssen and hism son Zacharias who saw cells. I am not sure about microorganisms unless to you this is the answer.


How did zacharias janssen contribute to the cell theory?

Zacharias Jansen (c. 1580 - c. 1638) was a Dutch spectacle-maker credited with inventing the first microscope. By the end of the seventeenth century, further developments by Anton van Leeuwenhoek and Robert Hooke allowed Jansenâ??s microscope to be expanded on and this led to the observation of cells under a microscope.


Which Hollywood celebrity speaks fluent dutch?

Famke Janssen