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microscopes 45
about microscpes
| Question | Answer |
|---|---|
| where does the first simple microscope come from | the middle ages |
| who made the earliest compound microscope | janssen brothers |
| who used another compound microscope to examine biological materials in 1610 | galileo |
| who made 400 different kinds of simple microscopes | Anton von leeuwehoek |
| What does the modern compound microscope have | Two sets of lenses |
| What is the eyepiece or ocular | The observer views the magnified material |
| What are the objectives | Gives degrees of magnification; 1 to 4 objectives |
| What is the usual low power magnification | 100x |
| What is the usual high power magnification | 430x to 440x |
| What is the formula | Eyepiece x objective |
| What does the electron microscope do | Substitutes of electron of light |
| What is the electron microscope maximum magnification | 100,000 to 200,000 |
| What are the types of electron microscopes | Transmission, scanning, n scanning tunnel |
| Transmission electron microscope | sends a beam of electrons through the specimen |
| Scanning electron microscope | – sends a beam of electrons through the specimen from L r |
| Scanning tunnel microscope | used to view living materials |
| Micrometer | (micron) 10-6 mm millimoth of a meter |
| Resolution | ability of a microscope to show fine details clearly |
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cutiepii101
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