1Real image vs Virtual image?
Real image is when rays converge while virtual image is when rays diverge. Virtual image would be mirror reflection. Real image would be cinema screen.
2What are the microscopes discussed in class?
Stereomicroscope, Biological scope, Polarizing scope, Comparison scope, Fluorescence scope, Electron microscope.
3What is Ocular lens? Objective lens?
Magnify the image produced by the objective lens. Directly observe the object the microscope user is examining.
4Describe stereomicroscope...
2 objective lenses, low mag, used for preparing samples
5Describe biological microscope...
Common microscope, X-Y stage
6Describe polarizing microscope...
Bertrand lens. Used to determine the difference between glass and any other similar substance.
7Filters of the polarizing microscope...
Polarizer - first filter beneath specimen, Analyzer - 2nd filter above specimen, Extinction - No light passing through 2nd filter.
8Describe Comparison scope...
Used for ballistics and hair, 2 stages.
9Describe the Fluorescence scope...
UV light source, Quartz lenses, Excitation filter to excite sample.
10Electron microscope?
Electrons are shot down through a tunnel onto sample and create image. High mag and resolution.
11Define parfocal...
All other objective lens are in focus.
12How to calculate total mag?
objective*ocular
13How to calculate max useful mag?
1000*normal aperature
14What is the max mag of any visible light microscope?
1500x