oil immersion

Lenses used to change the magnification of the specimen

• Body Tube

• Eyepiece

• Objective lenses

• Diaphragm

Moves stage up and down to focus specimen

• Stage

• Stage clips

• Diaphragm

• Coarse adjustment

Used to focus specimen, smaller adjustment than coarse adjustment

• Fine adjustment

• Stage

• Arm

• Base

Can you use the coarse adjustment on high power?

• Yes

• No

What power lens should you always start on?

• Low

• Medium

• High

• Oil Immersion

is the longer tube marked 40X. Identified by its blue banded color.

• Scanner

• Low power objective

• High power objective

• Oil immersion objective (OIO)

same length as the High Power Objective but affording a much higher magnification being stamped 100X. It needs a special oil to be placed on object studied. Identified by its white banded color.

• Scanner

• Low power objective

• High power objective

• Oil immersion objective (OIO)

To find total magnification multiply the

• Objective lens X the serial number

• Objective lens X the Ocular Lens

• Ocular Lens X the base number

• Ocular lens X the illuminating number

Once oil is used on a slide you should never return to

• the oil immersion lens

• Scanning power lens

• Medium power lens

• High dry 40X lens

When you are beginning to focus move the stage to

• the lowest position away from the objectives so that you are sure not to break a slide

• any position to start, it depends on the size of the specimen

• the highest position closest to the low objective

• it does not matter where you start focusing