Portage Learning: Microbiology Module 3 Latest 202

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Define the measurements micrometer and nanometer. ✔✔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 o... ne-billionth of a meter. What are the two critical factors that influence your ability to see an object? ✔✔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). If you wish to increase [Show More]

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