Bio7

• What is the function of the coarse adjustment knob on a microscope?


  It moves the body tube up and down in large movements to focus the image.
• When should you use the coarse adjustment knob?


  You should start with this knob when focusing with the low or medium power objective lens in place.
• What is the purpose of the fine adjustment knob?


  It moves the body tube in small movements to sharpen the focus.
• When should you use the fine adjustment knob?


  You should use only this knob when focusing with the high power objective lens in place.
• What is the function of the arm of the microscope?


  The arm acts as a handle and supports the body tube.
• What do stage clips do?

  Stage clips hold the slide in place on the stage.
• What is the purpose of the base of the microscope?

  The base supports the entire microscope.
• What is the ocular (eyepiece) of a microscope?


  The ocular is the lens you look through, which magnifies the object at 10x.
• What does the body tube do in a microscope?


  The body tube maintains the proper distance between the ocular and objective lenses and keeps light from scattering.
• What is the function of the revolving nosepiece?


  The revolving nosepiece holds the objective lenses and rotates to change the lens.
• How many objective lenses does the microscope have and what are their magnifications?


  It has 3 lenses: low (4x), medium (10x), and high (40x).
• What is the function of the stage in a microscope?


  The stage supports the slide and has a hole in the middle to allow light to pass through.
• What does the diaphragm do in a microscope?


  The diaphragm controls the amount of light going through the object and up the body tube.
• What is the role of the mirror in a microscope?


  The mirror bounces light up through the diaphragm, the stage, the object, and into the two lenses.