The microscope

Question 1

where was the magnifier discovered in writings ?

Answer 1

by roman philosophers

Question 2

what did the first magnifier look like ?

Answer 2

consisted of transparent crystals that were thicker in the middle of the edges , it looked like a lentil seeds

Question 3

when and where was the first microscope developed ?

Answer 3

in England during the 16th century

Question 4

what did the first microscope look like ?

Answer 4

a long tube with a plate for the object at one and a lens at the other end that magnified objects .

Question 5

when did the microscope become in existence ?

Answer 5

in 1597

Question 6

who created the first microscope ?

Answer 6

zacharias Janssen and his father Hans experimented with several lenses in a tube .

Question 7

what is a ocular lens ?

Answer 7

lens at the eye piece of the microscope

Question 8

what is an objective lens ?

Answer 8

enlarges the sample being observed

Question 9

who is the considered the father of the microscope ?

Answer 9

Anton van leeuwenkoek

Question 10

what is magnification ?

Answer 10

how much an object is enlarged q

Question 11

how does ocular lens usually magnify by ?

Answer 11

10x

Question 12

how does objective lens usually magnify ?

Answer 12

by 4x , 10x, and 40x

Question 13

how to obtain total; magnification ?

Answer 13

multiply the power of the ocular lens by that of the objective lens being used

Question 14

during what lens is magnification limitless ?

Answer 14

during a compound microscope

Question 15

how is resolution limited ?

Answer 15

is a limited in the magnification within a compound microscope

Question 16

what is resolution ?

Answer 16

the ability to distinguish very small and closely spaced objects as separate entities .

Question 17

what is the resolving power of compound microscope ?

Answer 17

1pm

Question 18

what does the resolving power of 1pm mean ?

Answer 18

means that two objects will appear as one if they are less than 1 pm apart

Question 19

how is the use of compound microscope advantageous compared to the human eye ?

Answer 19

because its able to resolve objects closer than 100 pm

Question 20

what does the arm on a compound microscope do ?

Answer 20

connects the occults and revolving nose piece to the base .

Question 21

what does the base on a compound microscope do ?

Answer 21

contains the light source ?

Question 22

what does the revolving nose piece do on a compound microscope do?

Answer 22

rotating mechanisms that holds 4 objects lens

Question 23

what is the scanning feature on compound microscope ?

Answer 23

4x , shortest lens, exhibits a red ring

Question 24

what is the low power feature on a compound microscope ?

Answer 24

10x , exhibits a yellow ring

Question 25

what is the high power feature on a compound microscope?

Answer 25

40x exhibits a blue ring

Question 26

what is the oil immersion feature on a compound microscope ?

Answer 26

100x, longest lens exhibits a ring light

Question 27

how to calculate ocular in combination with the scanning lens ?

Answer 27

40x[(10x) x (4x)]

Question 28

how to calculate ocular in combination with the low power lens ?

Answer 28

100x[(10x) x (10x)]

Question 29

how to calculate ocular in combination with high power lens ?

Answer 29

400x[(10x) x (10x)]

Question 30

how to calculate ocular in combination with oil immersion lens ?

Answer 30

10000 [ (10x) x (10x)]

Question 31

what is the mechanical stage ?

Answer 31

platform on which the slide is placed. it can be raised or lowered using the course and fine focus knobs .

Question 32

what is the course focus knob ?

Answer 32

is used for initial focus with the 4x objective

Question 33

what is the fine focus ?

Answer 33

makes very slight changes at 10x,40x, and 100x

Question 34

what is the slide holder ?

Answer 34

the string loaded device that secures the slide

Question 35

what is the mechanical stage controls ?

Answer 35

enables you to position the specimen above the opening in the stage .

Question 36

what does a condenser do ?

Answer 36

substage device that functions to collect and concentrate light evenly on the specimens. It can be raised or lowered using the condenser focus knob

Question 37

what is the iris diaphragm?

Answer 37

attached to the underside of the condenser. The iris diaphragm lever controls the amount of light passing through the condenser q

Question 38

if it object is somewhat transparent what can you do to make you view clearer ?

Answer 38

close the iris diaphragm redoing the amount of light and increasing the contrast of the images so that it may be seen clearly