New York, NY IMG HI 58° LO 56° Home About Contact
Home Biomedical Engineering Biology Class 9 To study different parts of simple (dissecting) microscope
Biology Class 9 Lab Experiments

To study different parts of simple (dissecting) microscope


To study different parts of simple (dissecting) microscope.

Material Required

Simple (dissecting) microscope, practical notebook, pencil, sharpners, eraser etc.


In structure and function, we can compare the microscope with an human eye. Both have lenses and in both the images of object are formed. Organisms even smaller than 1 mm are studies in the laboratory. Beside this, stained and mounted slides of various types of tissues and cells are studied because these microscopic structure cannot be seen by naked eyes, hence, microscope is used for the observation of such structure. We can see the magnified image of the object with the help of microscope. The power to magnify an object is called magnifying power. The ratio of magnified image and original image is called the magnifying power of the instrument.

Magnifying power of microscope =

The size of magnified image by microscope / The size of the normal image by naked eye

Two types of microscope are used in biology laboratory :

  1. Simple (dissecting) microscope.
  2. Compound microscope.


Observe the given instrument carefully and draw the labelled diagram of the instrument on your practical notebook.

Structural observation

The simple dissecting microscope consists of only one convex lens. The simple dissecting microscope consists of the following parts:


  1. Foot - It is Y shaped and made of iron which supports the whole instrument.
  2. Stand - It is connected with a foot which has a reflecting mirror.
  3. Mirror - It focusses the light on the object to be observed.
  4. Stage - It is made of glass and fitted above the stand.
  5. Clip - There are two clips behind the stage, which are used to press the slide.
  6. Vertical arm - It is fitted in the stand and used to adjust the focus.
  7. Adjustment screw - It is fitted on the vertical arm and helps in focussing.
  8. Folded arm - A movable and rotating arm is situated above the vertical arm which has a convex lens.
  9. Convex lens - An object is observed through it.


It is the used in the study of slide.