B1. Biology G
Cell structure and tra
,1.1 The world of
the microscope
• Units
• 1m= 1000 micrometres
• 1 micrometre – 1000 nanometres
• so 1 nanometre = 1 X 10(9)
• When converting into a larger
value divide and a smaller value X
,Quick test
• 1 km = ? m
• 1000
• 1mm = ? Um
• 1000
• 1m = ? Um
• 1000000
• 1Um = ? Nm
• 1000 Extension: write this in standard form
, THE LIGHT MICROSCOPE
Can be used almost anywhere
Were developed in the mid-17th century Use beam of light to form an image of
an object
Relatively cheap
They can magnify live specimens
Best can magnify up to X2000
Resolution= 200nm (how detailed the
picture is)
Cell structure and tra
,1.1 The world of
the microscope
• Units
• 1m= 1000 micrometres
• 1 micrometre – 1000 nanometres
• so 1 nanometre = 1 X 10(9)
• When converting into a larger
value divide and a smaller value X
,Quick test
• 1 km = ? m
• 1000
• 1mm = ? Um
• 1000
• 1m = ? Um
• 1000000
• 1Um = ? Nm
• 1000 Extension: write this in standard form
, THE LIGHT MICROSCOPE
Can be used almost anywhere
Were developed in the mid-17th century Use beam of light to form an image of
an object
Relatively cheap
They can magnify live specimens
Best can magnify up to X2000
Resolution= 200nm (how detailed the
picture is)
