Module 3 BIOD 171 Already Passed
True or False: A nanometeris longer than a micrometer.
What is the total magnification (relative to your eye) of a sample imaged with a 60x objective and a 10x eyepiece? Show your math.
Assuming a fixed ocular, identify the part of the microscope you would adjust...
1). True or false: a nanometeris longer than a micrometer.
Ans: False. A nanometer is 1,000 times smaller than a micrometer.
2). What is the total magnification (relative to your eye) of a sample imaged with a 60x
objective and a 10x eyepiece? show your math.
Ans: 60 x 10 = 600x magnification
3). Assuming a fixed ocular, identify the part of the microscope you would adjust to enhance
the magnification of a sample.
a. objective
b. condenser
c. iris diaphragm
d. eye piece
Ans: A. Only the oculars (eyepiece) and the objectives contribute to the magnification
of the sample. Since the eyepiece is fixed, only the objectives could be altered.
4). What is the total magnification (relative to your eye) of a sample imaged with a 20x
objective and a 15x eyepiece? show your math.
Ans: 20 x 15 = 300x magnification
5). True or false: staining is often required to image a cell that is adherent and flat (thin).
Ans: True. Adherent, flat and unstained cells are almost invisible due to the limits on
both resolution and contrast. Therefore, cell staining is often required to adequately
image the sample.
6). Assuming a constant (non-adjustable) light source power, identify the part of the
microscope you would adjust to limit the amount of light entering the microscope.select all
that apply.
a. objective
b. condenser
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