BIOD 171 MODULE 3 EXAM 2025/2026
EXAM QUESTIONS AND ANSWERS |
100% PASS
A nanometer is defined as: - 🧠 ANSWER ✔✔10 -9 or one-billionth of a
meter
True or False: A nanometer is longer than a micrometer - 🧠 ANSWER
✔✔False
A nanometer is 1000x smaller than a micrometer
Resolution and contrast are two critical factors that influence your ability to
see an object. Explain each. - 🧠 ANSWER ✔✔Resolution refers to the
distance between two objects at which the objects can still be seen as
separate. Poor or low resolution means two or more objects may appear as
one.
, Contrast on the other hand 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).
Assuming a fixed ocular, identify the part of the microscope you would
adjust to enhance the magnification of a sample. - 🧠 ANSWER
✔✔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.
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. - 🧠 ANSWER ✔✔Iris diaphragm
EXAM QUESTIONS AND ANSWERS |
100% PASS
A nanometer is defined as: - 🧠 ANSWER ✔✔10 -9 or one-billionth of a
meter
True or False: A nanometer is longer than a micrometer - 🧠 ANSWER
✔✔False
A nanometer is 1000x smaller than a micrometer
Resolution and contrast are two critical factors that influence your ability to
see an object. Explain each. - 🧠 ANSWER ✔✔Resolution refers to the
distance between two objects at which the objects can still be seen as
separate. Poor or low resolution means two or more objects may appear as
one.
, Contrast on the other hand 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).
Assuming a fixed ocular, identify the part of the microscope you would
adjust to enhance the magnification of a sample. - 🧠 ANSWER
✔✔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.
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. - 🧠 ANSWER ✔✔Iris diaphragm
