Q:

Where did Zacharias Janssen live?

A:

Zacharias Janssen lived in Middleburg in the Netherlands from 1580 - 1638 according to History of the Microscope. He was a spectacle maker who is credited for inventing the first compound microscope. Since the achievement was thought to have occurred in the 1590s, some suggest that Janssen's father contributed to the discovery of the microscope. It is still debatable as to whether or not Janssen also invented the telescope.

Zacharias Janssen's microscope consisted of three draw tubes with lenses inserted into the ends of the flanking tubes. The eye piece and objective lens were both convex in different planes, which was an impressive and advanced technology at the time. Focusing on an object with the microscope was achieved by moving the draw tube in or out. The object could be magnified up to three times when the instrument was closed and up to ten times when the instrument was fully extended. Although there are no early models of Janssen's microscope that are preserved, there is a similar construction in the Middleburg Museum in the Netherlands that historians attribute to Janssen. Although the construction of this initial microscope is very basic compared to the instruments used today, the basic application of such an advanced structure of lenses during this time period is what makes this contribution significant in history.


Is this answer helpful?

Similar Questions

  • Q:

    Who were Hans and Zacharias Janssen?

    A:

    Hans and Zacharias Janssen were a Dutch father and son accredited with the creation of the first microscope. Both lived in the Netherlands and were working with each other as spectacle makers.

    Full Answer >
    Filed Under:
  • Q:

    What did Zacharias Janssen invent?

    A:

    Zacharias Janssen invented the first compound microscope. Zacharias and his father, Hans, originally made eyeglasses, or spectacles, but Hans Janssen may have contributed to his son's invention. Although the first microscopes Janssen made were crude by modern-day standards, they did lead to the development of better scientific instruments.

    Full Answer >
    Filed Under:
  • Q:

    What is the Netherlands famous for?

    A:

    The Netherlands is famous for its wooden clogs, windmills, Gouda cheese, tulips and canals. Tourists flock to Noordoostpolder each spring to view the vibrant tulips at the Tulip Festival.

    Full Answer >
    Filed Under:
  • Q:

    Where is Holland?

    A:

    Holland, formally known as the Netherlands, is located in Western Europe. It is bordered by Belgium to the southwest and Germany to the east. The North Sea is located to the north and west of Belgium. England lies across the North Sea to the west.

    Full Answer >
    Filed Under:

Explore