MICROSCOPE Flashcards
=He is a Deutch scientist who used one of the microscopes to discover a whole new world of living organisms.
=He used SIMPLE MICROSCOPE
=observed tiny organisms in pond water and other substances.
Anton Von Leeuwenhoek
He is an English scientist, discovered that larger organisms have small microscopic subunits called “CELLS”
Robert Hooke
Made of a set of lenses. They are more powerful and more complex than those used by early scientists.
Compound Microscope
The set of lenses closest to your eye.
Ocular/Eyepiece
Holds the ocular in place.
Body tube
A turretlike circular mechanism rotates so that different lenses can be selected.
Revolving Nosepiece
True or False.
Always turn the nosepiece by holding the outside of the revolving disk– never push on the lens barrel
TRUE
The lens attached to the revolving nosepiece
Objectives
Used for initial location of the specimen
4x(scanning objective)
=used for initial location of the specimen
=for observing samples that don’t require higher magnification
10x(low-power objective)
=used for specimens requiring higher magnification.
40x(high-dry objective)
Why is high-dry objective called “dry”?
Because it doesn’t require oil unlike other high-power objective
Used for the magnification of microscopic specimens such as bacterial cells.
100x(high-oil objective)
How do you determine the total magnification?
It is determined by multiplying the power of the ocular by the power of objective in use.
Light rays from the lamp travel through a hole in the stage, through a specimen mounted on the slides, then through objective and ocular, to the eye
High-intensity lamp`
