B. The Bright-field Compound Mieroscope . Using the following list, label the pa

Question

B. The Bright-field Compound Mieroscope . Using the following list, label the parts of the bright-field compound microscope: base, dialirheostat, iris diaphragm, light souree, mechanical stage knobs, objeetive, ocular, pinion knob, revolving nosepiece, stage body tube, condenser lens, coarse adjustment knob, fine adjustment knob, illuminator 2. List the functions of the following components of the bright-field compound microscope. Component of the Microscope Function Ocular lens Revolving Nosepiece Iris Diaphragm Pinion knob or condenser lever Condenser lens Objective lens Coarse adjustment knob Fine adjustment knob 32

Explanation / Answer

1. On left side

From upside down.

-oculars

-arm

-mechanical stage knob

-fine focus knob

-coarse focus knob

-light source

-base

On right side

-body tube

-revolving nosepiece

-objective

-stage

-condenser lense

-iris diaphragm

-pinion knob

-illuminator rheostat

2.

Ocular lense:main eyepiece contains lens

Revolving nosepiece :holds high or low power objective lenses, can be rotated to change magnification

Iris diaphragm:controls amount of light reaching specimen.

Pinion knob:use to regulate amount of light entering the lens system.

Condenser lens:focus light onto specimen

Objective lens:magnification purpose

Coarse adjustment knob:use to quickly bring specimen to be close to in focus

Fine adjustment knob:use to bring specimen into sharp focus under low power

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