Parts of a microscope
• Arm – basic frame, used to carry microscope
Parts of a microscope
• Base – bottom stand, houses the light source
Parts of a microscope
• Body tube – contains mirrors to reflect light into the eyepiece
Parts of a microscope
• Eyepiece – ocular lens, nearest the eye, magnifies the image 10x
Parts of a microscope
• Nosepiece – rotating part that holds the three objective lenses
Parts of a microscope
• Objective lenses – lens closest to the specimen, magnifies the image
Parts of a microscope
• High power – magnifies 40x• Medium power – magnifies 10x• Low power – magnifies 4x
Parts of a microscope
• Stage – flat, table-like surface where the slide is placed
Parts of a microscope
• Stage clips – hold the slide on the stage
Parts of a microscope
• Diaphragm – disk-shaped device below the stage that controls the amount of light passing through the slide
Parts of a microscope
• Corse adjustment knob – roughly focuses the image by moving the stage up or down quickly
Parts of a microscope
• Fine adjustment knob – clarifies the image by moving the stage small distances slowly
Parts of a microscope
• Light source – the beam of light that passes through the slide
Use of the Microscope
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Magnification
• The number of times an object’s apparent size is increased by the lenses
Total magnification
• Multiply the two magnifications together
Eyepiece Objective lens Total Magnification
10x 10x
10x 40x
10x 4x
5x 10x
5x 40x
20x 10x
20x 40x
15x 20x
25x 30x
Parts of the microscope