Compound Microscope Review

Label parts

1 – body tube 2 – revolving nose piece 3 – objective lens (high power) 4 – stage clips 5 – stage 6 – illuminator or light source 7 – rheostat 8 - base

9 – fine adjustment knob 10 – coarse adjustment knob 11 – arm 12 – ocular lens (eye piece)

Explain what the following parts of the microscope do: 1 – ocular lens 2 – revolving nosepiece 3 – objective lenses (short vs. long) 4 – stage 5 – stage clips 6 – coarse adjustment knob 7 – fine adjustment knob 8 - rheostat

1 – ocular lens – look through; magnifies 10 X 2 – revolving nosepiece – changes objective lens 3 – objective lenses (short vs. long): short = low power; long = high power 4 – stage (supports slide) 5 – stage clips (holds slide in place) 6 – coarse adjustment knob (brings specimen into view) 7 – fine adjustment knob (brings out fine details) 8 – rheostat (adjusts light intensity)

What is the total magnification of a microscope if its eyepiece is 10 X and the objective lens being used is 20 X?

10 X multiplied by 20 X = 200 X magnification

As you change from a 2 X objective to a 40 X objective, what happens to: magnification ___________________________________   field of view ____________________________________ depth of field ___________________________________

As you change from a 2 X objective to a 40 X objective, what happens to: magnification _____increases_____________________   field of view ______decreases ____________________ depth of field _____decreases___________________

When using a microscope you must never use the _________________ while using the high power objective because ________________________________.

When using a microscope you must never use the _coarse adjustment knob_ while using the high power objective because _you may damage the lens and break the slide__.

If you move the slide up (away from you) while looking through the microscope, which way does the specimen appear to move? If you move the slide to the left, which way does the specimen appear to move?

If you move the slide up (away from you) while looking through the microscope, which way does the specimen appear to move? down (towards you) If you move the slide to the left, which way does the specimen appear to move? towards the right

How do you clean up a microscope at the end of the lab?

clean the slide and cover slip dry the stage turn to the lowest power objective lens lower stage using coarse adjustment knob turn the light off