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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • Who among the following invented Microscope?

    Question: Who among the following invented Microscope?

    Options:

    Antonie van Leeuwenhoek
    Robert Hooke
    Matthias Jakob Schleiden
    Zacharias Janssen

    🔑Key Points: 
    -A Dutch father-son team named Hans and Zacharias Janssen invented the first so-called compound microscope in the late 16th century when they discovered that if they put a lens at the top and bottom of a tube and looked through it, objects on the other end became magnified.
    -A compound microscope is a high-power (high magnification) microscope that uses a compound lens system.
    -A compound microscope has multiple lenses: the objective lens is compounded (multiplied) by the eyepiece lens to obtain a high magnification.
    -Higher magnification is achieved by using two lenses rather than just a single magnifying lens.

    🔴Additional Information::

    • Simple Microscope:
    -It is used to see the magnified image of objects.
    -It was invented by Antonie Van Leeuwenhoek.
    -It produces images that are virtual and enlarged.

    • Terrestrial telescope:
    -It is used to view distant objects on land.
    -The image produced by the telescope is virtual, erect, and small.
    -It consists of three lenses the third lens is to produce the erect image.

    • Compound Microscope:
    -A compound microscope uses two or more lenses to produce a magnified image of an object.
    -The image produced by the microscope is magnified, virtual and inverted.

    • Astronomical telescope:
    -It is used to view celestial bodies like stars and planets.
    -The image produced by this telescope is virtual inverted and small.

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