The Compound Microscope. A. Eyepiece B. Body Tube C. Coarse Adjustment D. Fine Adjustment E. Arm F. Revolving Nosepiece G. High Power Objective H. Low.

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The Compound Microscope

A. Eyepiece B. Body Tube C. Coarse Adjustment D. Fine Adjustment E. Arm F. Revolving Nosepiece G. High Power Objective H. Low Power Objective I. Stage Clips J. Stage K. Diaphragm L. Light Source (Lamp) M. Base A E J C D M B F H Medium (10x) G I K L

A Compound Microscope has 2 Lenses –A compound light microscope uses two lenses to make an image look bigger. One is the eyepiece lens and the other is the objective lens. Each lens bends the light making the image look larger. –THINK! - What is the magnification number on the eyepiece? 10x –THINK! - What is the magnification number written on each objective lens? low power: 4x medium power: 10x high power: 40x

Calculating Total Magnification –To figure out the total magnification use this equation: Total Magnification (x) = Eyepiece Mag. x Objective Mag. –THINK! - Use the equation above to calculate total magnification. Total Magnification under Low power= »10 x 4 = 40x Total Magnification under Medium Power = »10 x 10 = 100x Total Magnification under High Power = »10 x 40 = 400x

Extra Practice EyepieceObjective LensTotal Magnification a) 10x10x b) 10x44x c) 5x10x d) 20x10x e) 20x40x 100x 440x 50x 200x 800x **Practice Website: