The Compound Light Microscope Camera attachment tube Eyepiece (ocular lens) Ligh

Question

The Compound Light Microscope Camera attachment tube Eyepiece (ocular lens) Light pathway Coarse and fine focusing adjustment knobs Arm Body tube Objective lens Stage Light source Specimen Condenser Illuminator Base Figure 3-12 Microbiology, 7/e Find the light source. Follow the path of light (yellow) from the source to the observer's eye (1) How many lenses does the light pass through as it travels between the specimen and the observer? (2) If the objective lens magnifies the appearance of an object 40 times and the ocular lens magnifies the appearance of an object 10 times, what is the final magnification of the image?

Explanation / Answer

1. Objective lens and Ocular lens

The light travels from light source to the condenser then to the specimen, followed by objective lens and ocular lens.

2. The final magnification of the image is 400 x ( or 400 times of the original image)

Since magnification of the objective lens is 40x (or 40 times)

magnification of the ocular lens is 10 x (or 10 times)

Final magnification = Product of Objective lens and Ocular lens

= 40 x 10 = 400 X or 400 times of original image

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