Bio lab 3

what are the 2 types of light microscopes

compound microscopes and stereomicrospes

compound microscopes

• has 2 lenses

• uses transmitted light

• magnification from 40-400X(used for smalled things)

stereomicroscopes

• ocular lenses

• reflected light

• magnification from 8-32x( used for larger things)

label compound microscope

a- ocular lenses

b- clip

c- iris diaghrahm

d- power

e- light intenisty control

f-

g- objective lense

h- stage

i- x/y axis

j- coarse focus knob(moves alot)

k- fine focus knob( moves alittle )

working distance

distance from bottom of lens to top of slide

field of view

size of viewsing area

• measured in mm and reported in um

• 1mm+1000um

how to find diameter high

diameter scanningXmagnification scanning/magnification high

how to calculate size of a cell

diameter of FOV/ #of cells across FOV

2 types of cells

• prokaryotic(bacteria, archea

• eukaryotic ( plants

3 domains of life

• bacteria

• archea

• eukarya

eukaryotes are larger and more complex than prokaryotes

• 
  

objective lenses

• scanning= 4x

• low power= 10x

• high power=40x

how to find total magnification

ocular x objective= total magnification

what magnification is ocular lens

10x

cyribacteria is..

prokaryotic