Transcript Microscope powerpoint

Microscopes
Development of the microscope
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Anton van Leeuwenhoek
Father of Microbiology
Made his own lenses
(some as powerful as the
microscopes we use in
class)
Microscopes
Type of microscope
Focuses
what
Through
/Surface
Magnifies
up to
Live
organisms?
Compound light microscope
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Focuses light
Uses combination of
lenses
Shines light through
objects
Magnifies up to 1000
times (ours are 400x)
Can view live organisms
www.science.smith.edu/.../Labmanual/01CELLS.htm
http://www.bioweb.uncc.edu/1110Lab/notes/notes1/labpics/Elodea%20Leaf40c.jpg
Dissecting microscope
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Focuses light
See surface of objects
Magnifies up to 40 times
Can view live organisms
Uses combination of
lenses
wappingersschools.org/.../visualvocab/page4.html
http://www.keweenawalgae.mtu.edu/ALGAL_IMAGES/charophyceans/Chara_d2_LApond2e_3.15x.jpg
Electron microscope
Two types:
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Transmission electron microscope (TEM)
Scanning electron microscope (SEM)
Transmission electron microscope
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Focuses electrons
Sees through objects
Magnifies up to 100,000
times
Can view only dead or
inanimate objects
www.phy.cuhk.edu.hk/.../CM120/CM120.html
Transmission electron microscope
Mammalian mitochondrion
biology.unm.edu/.../Summaries/Cell.html
Scanning electron microscope
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Uses electrons
View surface of objects
Magnifies up to 10,000
times
Views only dead or
inanimate objects
http://gsc.nrcan.gc.ca/ebeam/sem_e.php
Scanning electron microscope
Bee eye
www.rdg.ac.uk/cfam/facilities/sem.htm
Viruses budding
from a cell
Transmission electron
microscope
Scanning electron
miscroscope
www.
aecom.yu.edu/aif/gallery/sem/sem.htm
Ion microscope
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Uses positively charged
ions
surface
Magnifies up to at least
1,000,000 times
Cannot view live
organisms
tungsten
atoms
through ion
microscope
http://www.aip.org/mgr/png/images/wolkow.jpg
Question # 11 & 12