Score for this quiz: 100 out of 100 *
Submitted Aug 2 at 10:37am
This attempt took 18 minutes.
Question 1
pts
A nanometer is defined as:
A. 10-3
B. 10-6
C. 10-9
D. 10-12
B.
A.
Correct!
C.
D.
Question 2
pts
, Resolution and contrast are two critical factors that influence your ability to see an
object. Explain each.
Your Answer:
Resolution: distance between 2 objects where objects can be seen as separate. If the
two objects are too close to each other, a greater resulution requirement will be required
to view the 2 objects as separate.
Contrast: difference in light abdorbance between 2 objects. The lower the contrast
between the object and the background, the harder it will be to view the object. The
higher the contrast, the easier it will be to view the object.
Resolution refers to the distance between two objects at which the objects still
can be seen as separate. Poor or low resolution means two (or more) objects may
appear as one.
Contrast is the difference in light absorbance between two objects. Poor contrast
gives a high background and makes the visualization of multiple objects difficult.
For instance, trying to identify 2 dark colored objects at night (low light = low
contrast) versus the same 2 objects in the middle of a sunny afternoon (bright
light against 2 dark objects = high contrast).
Question 3
pts
Assuming a fixed ocular, identify the part of the microscope you would adjust to
enhance the magnification of a sample.
Iris diaphragm
Correct!
Objective
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.
Eye piece
Condenser
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