Components of a Microscope

What is the function of the coarse adjustment knob of a light microscope?

• Adjust the focus

• Hold the objectives of different magnifications

• Regulate the amount of light passing through the condenser

• Reflect light to shine through the specimen

How to calculate the total magnification of a compound microscope?

• magnification of the eyepeice X magnification of the objective

• magnification of the eyepiece X magnification of the objective

• magnification of the nosepiece X magnification of the objective

• magnification of the coarse adjustment knob X magnification of the objective

Lower magnification means...

• Smaller area of specimen observed

• Larger area of specimen observed

• More details of the image observed

• Dimmer image

Which of the following combinations of eyepiece and objective provides the highest power magnification?

• 4X20X

• 8X10X

• 15X10X

• 10X20X

Compared with the observation at low power magnification, a smaller area of the specimen is observed at high power magnification. More details are shown but the image is dimmer.

• Larger area, Fewer details, Brighter

• Smaller area, Fewer details, Brighter

• Larger area, More details, Dimmer

• Smaller area, More details, Dimmer

This is where the slide is put for observation.

• Arm

• Body tube

• Cover

• Stage

When the typed letter 'b' is observed under the microscope, the image appears as 'q'. This shows that the image formed by a light microscope is upside down and reversed from left to right. We call this an inverted image.

• Inverted and dim

• Right side up and clear

• Reversed from top to bottom

• Upside down and reversed laterally

What happens to the image when you move the slide to your right?

• The image appears to move to the left

• The image appears to move to the right

• The image becomes clearer

• The image becomes dimmer

What happens to the image when you move the slide away from the arm of the microscope?

• The image appears to move towards the arm

• The image becomes dimmer

• The image appears to move away from the arm

• The image becomes clearer

The total magnification of a compound microscope is the product of the magnification of the eyepiece and the magnification of the objective.

• Cannot be determined

• False

• True

• Partially true