Microscopes & magnification calculations

What is the name of the structure labeled #10?

• objective lens
• ocular lens
• diaphragm

• nosepeice

What is the function of the structure labeled #10?

• controls amount of light that passes through the slide
• it is used to change the magnification of the object
• it holds that slide in place
• it is used to carry the microscope

What is the name of the structure labeled #4?

• stage
• course adjustment knob
• fine adjustment knob
• stage clips

what is the function of the structure labeled #4?

• used with meduim and high power objectives to bring an object into focus
• used with low power objective to bring an object into view

• used with all objectives to bring an object into focus

• it is used to change the magnification of the object

A microscope has an ocular magnification of 10 and a high power objective magnification of 40. What is the highest total magnification of the microscope?

• 500x
• 400x
• 50x
• 40x

What is the approximate size of one of the cells in the field of view shown?

• 0.5 mm
• 1.0 mm
• 1.5 mm
• 2.0 mm

What is the field diameter in the field of view shown if each thick grid line is 1.0 mm wide?

• 230 mm
• 0.23 mm

• 2.3 mm

• 23 mm

A microscope is supplied with 10x and 15x eyepieces and with 10x and 44x objective lenses. What is the maximum magnification that can be obtained from this microscope?

• 59x
• 150x
• 440x
• 660x

What type of microscope do we use in 7th grade science?

• compound light microscope

• scanning electron microscope

• dissecting microscope

• steroscope

Which of the following should you do first when you use a microscope?

• place the slide on stage

• use the course adjustment knob to bring the object in to view using the low power objective

• focus the object using the fine adjustment knob

• use the course adjustment knob to bring the object into view using the high power objective