Microscope


Micro Organism I - Concepts
Class - 8th Foundation NTSE Subjects
 
 
Concept Explanation
 

Microscope

There are a variety of organisms on our planet. Some are extremely large like the blue whale, whereas some are very tiny and cannot be seen with our naked eye like Amoeba. Such extremely tiny organisms known as microorganisms can be seen with the help of an instrument called microscope. The study of such microorganism is called microbiology.

    

MICROSCOPE: A microscope is an instrument that magnifies smaller objects with the help of lenses. It is also known as a compound microscope. The different parts of a microscope are shown in the figure. The object to be viewed is generally referred to as the specimen.

A thin sheet of glass called a microscopic slide is used to hold a small sample of the specimen.

A second, much thinner, sheet of glass called cover slip is placed over the sample. The cover slip protects the microscope’s objective lens by preventing it from coming into contact with the specimen sample. It also helps to create an even thinness for the sample.The basic steps to use a microscope are as follows.

  • Clean the mirror using a soft, clean cloth, if required.
  • Place the slide (with the specimen) on the stage.
  • Adjust the focus of the eyepiece and the objective lens.
  • View the slide through the eyepiece.       
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    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Which of the following are correct :

    (a) Extremely tiny organisms known as microorganisms can be seen with the help of an instrument called microscope.

    (b) A microscope is an instrument that magnifies smaller objects with the help of lenses. It is also known as a compound microscope.

    Right Option : C
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    Explanation
    Question : 2

    Bacteria can be seen only

    Right Option : C
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    Explanation
    Question : 3

    Which of the following are correct :

    (a) The study of microorganism is called microbiology.

    (b) A thin sheet of glass called a microscopic slide is used to hold a small sample of the specimen.

     

    Right Option : C
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    Explanation
     
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