ffoe level
"" "
, skiffs round ymrEEi¥
cell
theory
microscopes to discover cell
study
°
necessary
→
t
of cells
living things
→
all are made
→
smallest unit of life is the cell
from ( cell division )
all cells arise
existing cells
→
cells can't be seen unless
magnified
°
tight microscope
ocular
eyepiece
XIO
¥4,0 } objective lenses
Total magnification
•
multiply tens A
by lens B =
total
magnification
total
A
calculating lens =
•
on a lens a
lens B
magnification
of the microscope
micrograms photographs objects under
° →
shows
heading magnification in brackets at end
→
size in
calculating real life :
( ie 4500×1
1. note
magnification
(
2. measure diameter of cell in millimeters 1mm )
length from one side to the other through centre )
(
size from pm)
→
3. convert mm to micrometers 1mm 1000
pm multiply by 1000
= to
4. true size : divide micrometers by magnification
"" "
, skiffs round ymrEEi¥
cell
theory
microscopes to discover cell
study
°
necessary
→
t
of cells
living things
→
all are made
→
smallest unit of life is the cell
from ( cell division )
all cells arise
existing cells
→
cells can't be seen unless
magnified
°
tight microscope
ocular
eyepiece
XIO
¥4,0 } objective lenses
Total magnification
•
multiply tens A
by lens B =
total
magnification
total
A
calculating lens =
•
on a lens a
lens B
magnification
of the microscope
micrograms photographs objects under
° →
shows
heading magnification in brackets at end
→
size in
calculating real life :
( ie 4500×1
1. note
magnification
(
2. measure diameter of cell in millimeters 1mm )
length from one side to the other through centre )
(
size from pm)
→
3. convert mm to micrometers 1mm 1000
pm multiply by 1000
= to
4. true size : divide micrometers by magnification
