Microscope Focusing Techniques and Procedures

This video tutorial demonstrates how to properly focus a microscope. It begins with setting up the microscope and adjusting the light intensity. The process of focusing starts with using the low power objective and coarse focus to locate the specimen. Once the specimen is found, the medium power objective is used with fine focus for better clarity. The tutorial then explains the oil immersion technique for high magnification at 100x. Finally, it concludes with instructions on how to clean and store the microscope safely.

What is the first step in preparing the microscope for focusing?

• Placing the slide on the stage

• Using the coarse focus

• Adjusting the light intensity

• Turning on the microscope

How can you confirm that you are focusing on the correct plane at low power?

• By rotating the objective lens

• By wiggling the stage to see if the specimen moves

• By adjusting the light intensity

• By using the fine focus knob

What should you do after focusing at 10x before moving to 40x?

• Apply immersion oil

• Use the coarse focus again

• Turn off the microscope

• Rotate the 40x objective into place

When focusing at 40x, how much should you turn the fine focus knob?

• Half a rotation

• One complete rotation

• More than two complete rotations

• As much as needed

What is the purpose of applying immersion oil before using the 100x objective?

• To clean the slide

• To increase light intensity

• To protect the lens

• To improve resolution and focus

What should you do after finishing your observation at 100x?

• Leave the microscope as is

• Lower the stage and clean the microscope

• Remove the slide and store it

• Turn off the light