Biology class 9th (Fundamental unit of life) Cell Part-02

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                                BIOLOGY

                        Fundamental unit of life

                                       Part - 2


Instruments For Studying Cells


  • Cells are too small to be seen by naked eye. 


  • Cells study with the help of an instrument called a microscope.


     # There are many types of microscope. 


     #The most common types of microscopes are as follow :


  1. Compound microscope : It is a high resolution instrument that uses glass lens for magnification and visible light for illumination.


  • It was discovered by Z. Janssen.

                                   

                                                        Compound microscope


(b) Electron microscope : It is an instrument that uses electromagnets instead of glass lens for magnification and electrons instead of visible light for illumination.


  • It was discovered by the knoll and Ruska.


  • It uses high voltage electricity for observing subcellular structures which cannot be seen by a compound microscope.


  • Topics discussed MCQS



Biology class 9th next part  click here 👉.  Cell next part

Biology class 9th previous part click here 👉 Cell previous part

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