0 amount om Exercise 3.6: Parts of a Dissecting Microscope 8. Identify two diffe
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0 amount om Exercise 3.6: Parts of a Dissecting Microscope 8. Identify two differences between a dissecting microscope and compound microscope. 9, tht three types of specimens dssecting microscope might be used to view hat oPa com pouns micra Can You Apply What You've Learned? 10. What microscoge structures are used to control the amount of ight iluminadng the specimen? 11. What happened to the light when switching from low to high power? he halh pauer obiegtive The lioht 12. What adjustment will ypically have to be made to the light a fer changing from the low-power to thile high-power obialtive 13. B. How does working distance change as total magnification increases? b. What are the practical consequences of this change in working distance? 14. If four cellis are visible within the field of view at the field's maximum diameter, and the total magnification is 200x, how many c at a total magnification of 500x? Can You Synthesize What You've Leaned? 15. Describe why images viewed with s compound microscope are two-dimensional wharess images viewed with a dissecting microscope are threedimensiona A patient presented to his physician complaining of an unusual growth on the skin of his upper back The physician was unable to identify the growth, so she decided to perform a biopsy take a tissue sample). After obtaining a sample of the unusuel growth on the patients beck, the physician sent the sample to the pethology lab. Discuss how the pathologist would make use of a compound nicroscope to correctly diagnose the idencty of the unusual growth Chapter Three The Microscope 56Explanation / Answer
12. Increase the light as the objective lens opening decreases with increasing magnification allowing less light to enter.
13 a. The working distance decrease with increase in magnification.
13 b. The high power objective lens moves much closer to the specimen than the low power objective lens in order to focus.
14. The ratio of low to high power is 200/500=0.4.
If we can see 4 cells across low field of view we will see 0.4 as many in the high field of view.
0.4 * 4 =1.6 cells
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