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Suppose you measure the scanning (4x) field of vision diameterwith a stage micrometer and it is 2 mm. If high power is 40x, andgives you 10x more magnification than scanning power, how big willthe diameter of the field of vision be using high power? (Solve byusing diameter 1 times magnification 1 = diameter 2 timesmagnification 2).

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Trinidad Tremblay
Trinidad TremblayLv2
29 Sep 2019

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Related questions

1. The length of a stage micrometer is 1 mm and it is markedwith 100 tic marks including 10 long tic marks with number labels(0.1, 0.2, 0.3, etc.). The eyepiece (ocular) graticule has 50 ticmarks, with a longer tic mark at every 10th position (meaning thereare 5 groups of 10 units = 50 eyepiece graticule units). When thestage micrometer under the 10x objective lens is lined up with theeyepiece graticule so that the tic marks all face the same way andthe zeros start at the same vertical line, the 50th unit line onthe eyepiece lines up with the 0.4 mm line on the stage micrometer.Determine the value of one eyepiece unit. How much is the measureof each eyepiece unit in microns?

2. Consider another scientist using a different microscope wherethe objective power is changed from 10x to 40x. This scientistfirst lines up the stage micrometer under the 10x objective lenswith the eyepiece graticule so that the tic marks all face the sameway and the zeros start at the same vertical line. Then theinvestigator rotates the objective lenses to position the 40xobjective lens in line to magnify the stage micrometer. Thescientist notices that the micrometer must be moved to once againline it up to match the zeros with the eyepiece graticule again.This time the 50th unit line on the eyepiece lines up with the 0.21mm position under the 40x magnification. How much should thescientist calibrate one eyepiece unit of measure to be under this40x objective in microns?

Really need help with two pretty simple biology questionsregarding field diameter. Thanks for any help!

1. Use your knowledge of field diameter to calculate thediameter of a Paramecium that takes up 1/4 of the field diameterusing the 40X objective. Assume that the field diameter of a 4Xobjective is 5.5 mm. Show all work to receive credit for youranswer

2. How fast (in mm/sec) is the Paramecium (in question5) traveling if it moves across the full field diameter in 1.5seconds? Convert your answer from mm/sec to km.hr. How does thisspeed compare to speeds you are more familiar with? Show all workto receive credit for your answer.

Expalin in detail each question and provide a concise answer.

1.You are assigned a microscope that is equipped with 5X, 10X, 20X, 40X objective lenses. Which one of these objective lenses should be used when you first examine a slide specimen under the microscope? Explain why this objective should be used.

2.How will working distance change as you progress from a low power objective to successively higher power objectives?

3. What causes the inversion of image that you observed through the compound

microscope? Which lens is responsible for this phenomenon?

How does the fieldof view change as you progress from a low power objective to successively higher power objectives?

How does the size of the iris diaphragm opening affect contrast? Consider both light colored samples and dark samples (i.e. a white nylon thread and a black hair).

How does the size of the iris diaphragm opening affect resolution? Would this be affected by the magnification used to observe the sample?

7. How does depth of field change as you progress from a low power objective to

successively higher power objectives?

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