Due No due date Points 0 Questions 15 Time Limit None This quiz is currently locked. Attempt History Attempt Time Score LATEST Attempt 1 13 minutes 0 out of 0 Score for this quiz: 0 out of 0 Submitted May 30 at 12:44pm This attempt took 13 minutes. A micrometer (µm) is defined as being one-millionth of a meter and is commonly designated at 10-6 meters. A nanometer (nm) equals 10-9 m or one-billionth of a meter. Your Answer: A micrometer is the measurement of one millionth of a meter. A nanometer is one-billionth of a meter. Define the measurements micrometer and nanometer. Question 1 0 / 0 pts 2/8 T Question 2 0 / 0 pts 3/8 What are the two critical factors that influence your ability to see an object? Your Answer: Resolution and contract. Resolution = distance between two objects. Contrast = light absorbance differentiation between two objects. Resolution and contrast. 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. The 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). The iris diaphragm controls the amount of light that passes through the sample and into the objective lens. Thus, as you open the iris more light is permitted to pass through to illuminate the sample. Your Answer: The iris diaphragm. If you wish to increase the amount of light going into a microscope, what part would you adjust? Question 3 0 / 0 pts 4/8 00 Once light passes through the sample and the objective lens it is directed through the ocular lens, or eyepiece, directly into your eye. Your Answer: Ocular lens. As light passes through a microscope, what is the last piece that light passes before reaching your eyes? Question 4 0 / 0 pts Total magnification is calculated by multiplying the power of the objective and the power of the eyepiece. For instance, a 40x objective with a 10x eyepiece would make an object appear (40 x 10) 400 times larger (400x). Your Answer: It is multiplied by the 10x ocular lens X 40x objective objective lens = 400x magnification How is the total magnification of an object calculated? Question 5 0 / 0 pts Question 6