10. what is accomplished by turning the coarse adjusment upwards/downwards
I. Facilities the changing of objects.
ll. Focuses or brings out the object to be observed.
lll. Facilities the changing of eyepiece.
lV. Connects the eyepiece to the revolving nosepeice with the objectives.
A. l and ll only
B. ll and lll only
C. l and ll, lll only
D. l, ll, lll and lV
11. Why do you have to watch from the side when changing objectives?
I.Objectives are of different lengths.
II. The HPO is longer and can easily crash into the cover slip and slide.
III. It allows one to tilt the microscope, so viewing is possible while seated.
IV. This is done to prevent accidental crashing of the objectives into the slide and breakage of lens, slide, or cover slip.
A. I & II only
B. I & III only
C. I, II and IV only
D. II & Ill only
12. The magnification of a microscope is equal to
A. the magnification power of the objective lens divided by that of the ocular lens.
B. the magnification power of the objective lens divided by the numerical aperture.
C. the product of magnification produced individually by the ocular and objective lenses.
D. the product of magnification produced individually by the ocular and numerical aperture.
[tex]\Huge\boxed{{\mathbb{(≧∇≦)/}}}[/tex]
