Imagine you are looking at a cluster of human epithelial (skin) cells using the

Question

Imagine you are looking at a cluster of human epithelial (skin) cells using the 40x objective. The diameter of each cell is approximately one eighth (1/8) of the diameter of the field of view. What is the approximate diameter of the skin cells? Show your work and give your answer in BOTH millimeters (mm) and micrometers (um) Depth of field swer the following questions about your observations of the slide with three crossed threads. a. Can you see all three threads in sharp focus at the same time under low power (4x lens)

Explanation / Answer

The field view diameter fo 40X lens is 0.45mm . The epithelial cell is 1/8th of the field view . So 0.45 /8 = 0.056 mm . mm can be expressed as 1/25th of an inch . Similarly micrometer can be said as 1/ 25000th of an inch. Thus in micrometers here it can be written as 56 micrometers.

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