Title: Microscopes
1Microscopes
2(No Transcript)
3Development of the microscope
- Anton van Leeuwenhoek
- Father of Microbiology
- Made his own lenses (some as powerful as the
microscopes we use in class)
4Microscopes
Type of microscope Focuses what Through /Surface Magnifies up to Live organisms?
5Compound light microscope
- 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
6http//www.bioweb.uncc.edu/1110Lab/notes/notes1/la
bpics/Elodea20Leaf40c.jpg
7Dissecting microscope
- Focuses light
- See surface of objects
- Magnifies up to 40 times
- Can view live organisms
- Uses combination of lenses
- wappingersschools.org/.../visualvocab/page4.html
8http//www.keweenawalgae.mtu.edu/ALGAL_IMAGES/char
ophyceans/Chara_d2_LApond2e_3.15x.jpg
9Electron microscope
- Two types
- Transmission electron microscope (TEM)
- Scanning electron microscope (SEM)
10Transmission electron microscope
- 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
11Transmission electron microscope
- Mammalian mitochondrion
- biology.unm.edu/.../Summaries/Cell.html
12Scanning electron microscope
- 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
13Scanning electron microscope
- Bee eye www.rdg.ac.uk/cfam/faciliti
es/sem.htm
14 - Viruses budding
- from a cell
- Transmission electron microscope
- Scanning electron miscroscope
- www.
- aecom.yu.edu/aif/gallery/sem/sem.htm
15Ion microscope
- Uses positively charged ions
- surface
- Magnifies up to at least 1,000,000 times
- Cannot view live organisms
16tungsten atoms through ion microscope
http//www.aip.org/mgr/png/images/wolkow.jpg
17Question 11 12