Most Important Diagrams in Class 9 to practice for CBSE Class 9 Science Exam 2024. Simple Compound Microscope Diagram Class 9 NCERT with Labels Easy Colour Drawing and Explanation.
Compound Microscope Diagram Class 9 With Labels And Explanation
Compound Microscope Diagram
A compound microscope uses a combination of simple lenses in the objective and the eyepiece. It offers a much higher magnification of an object than the simple microscope.
Description:
The compound microscope consists of the following parts–
- Base – It is the basal part that is bifurcated and supports the weight of the microscope. It is made of a metal.
- Arm – It is curved and supports the body tube, knobs for coarse and fine adjustments, stage and mirror. It is used for holding the microscope. The arm is attached to the base by an inclination joint.
- Body tube – It is a hollow tube attached to the upper end of the arm. It has the eyepiece at the upper end and a circular, movable metallic ring called nose piece at the lower end. Objective lenses are screwed into the grooves present beneath the nose piece. Usually two objective lenses of 10X (low power) and 40X (high power) magnification are provided.
- Stage – It is a rectangular platform attached to the lower end of the arm. There is a hole at the centre of the stage which allows light from the mirror to pass through it and to fall on mounted slide. A pair of clips is provided to hold the slide firmly on the stage.
- Diaphragm – It is present below the stage and is used for adjusting the intensity of light.
- Coarse adjustment knob – It is attached to the arm and it moves the body tube up and down for focusing the object.
- Fine adjustment knob – It is attached to the arm and moves the body tube up and down very slowly. The fine adjustment is very essential for fine focusing of object, particularly in high power.
- Mirror – A plano-concave adjustable mirror is fitted below the stage to reflect light onto the objective.
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