Use & Care of the Microscope

the slide should be almost in focus when changing to higher magnifications

350x

Which part of the microscope would you use to bring a slide that you are trying to look at into focus? Course adjustment Oculars High power lens Stage

Course adjustment

Recall the different techniques for improving contrast of a specimen in the video. When you look under the microscope you see the following image.Low contrast image of specimen How could you best improve the contrast of this specimen? View Available Hint(s) Rotate the nosepiece to a higher objective. Rotate the fine adjustment knob. Rotate the condenser knob. Open or close the iris diaphragm.

Open or close the iris diaphragm.

Which of the following lenses on the compound light microscope will magnify a slide by the SMALLEST amount?Part complete Ocular lens High power lens Low power lens Scanning lens

Scanning lens

Which of the following sentences regarding microscope care and handling is correct? View Available Hint(s) Carry the microscope by the arm. Use a paper towel to clean ocular and objective lenses before and after use. Never use a coverslip with wet mount preparations. Store the microscope with the 40× objective in position, the cord wrapped and secured, and the power off. Use the coarse adjustment knob only with the lowest-power objective.

Use the coarse adjustment knob only with the lowest-power objective.

You should always begin observation of specimens with the oil immersion lens. True False

false

Which of the following is the correct formula for calculating total magnification using the microscope?Part complete power of the lens you are using x power of the course adjustment knob power of the right ocular x power of the left ocular power of oculars x power of the lens you are using

power of oculars x power of the lens you are using

The microscope slide rests on the __________ while being viewed. stage iris base condenser

stage

Part A Part complete Your lab microscope is parfocal. This means that __________. you can easily discriminate two close objects as separate the specimen is clearly in focus at this depth the slide should be almost in focus when changing to higher magnifications

the slide should be almost in focus when changing to higher magnifications

How do you clean the lenses of your microscope? with soap and water with special lens paper and cleaner with a paper towel

with special lens paper and cleaner