lab quiz 2

Question 1

we cannot use a microscope to see

Answer 1

viruses

Question 2

resolution

Answer 2

when you can tell 2 objects apart

Question 3

magnification

Answer 3

how big something is

Question 4

relationship between magnification and field of vision

Answer 4

magnification goes up, field of vision goes down

Question 5

why use immersion oil with the 100x objective lens?

Answer 5

oil helps generate more light at higher magnification, because its index of refraction bends light more directly into the lens

Question 6

proper way to carry microscope?

Answer 6

unscrew ocular section and carry separately, carry the rest by the neck.

Question 7

typical magnification of an ocular lens?

Answer 7

10x

Question 8

scanning lens

Answer 8

4x; they provide observers with about enough magnification for a good overview of the slide, essentially a “scan” of the slide

Question 9

low power lens

Answer 9

10x;

Question 10

high power lens

Answer 10

40x; ideal for observing fine details within a specimen sample.

Question 11

oil immersion lens

Answer 11

100x; Without adding a drop of immersion oil, the oil immersion objective lens will not function correctly, the specimen will appear blurry, and you will not achieve an ideal magnification or resolution.

Question 12

types of objective lenses?

Answer 12

scanning, low power, high power, oil immersion

Question 13

total magnification of a sample with an ocular lens power of 10x using the high power lens

Answer 13

10 x 40 = 400x

Question 14

what is the diaphragm?

Answer 14

constricts to control how much light is let in

Question 15

why start with low power scanning lenses?

Answer 15

easier to focus IN rather than having to backtrack out.