Lab practicle 1 Flashcards
Where do you discard Petri plates and contaminated swabs?
Blue Bio Hazard plate
why must you disinfect your work area before and after lab sessions?
to limit the spread of dust-borne organisms as well as destroy any organisms that may have contaminated the work area.
who was the first researcher to view and describe microorganisms?
ANTONI VAN LEEUWENHOEK
what is a bright field compound microscope?
shows dark objects in a bright field
Field of view?
the area seen through a microscope
Resolution?
the ability of a lense to reveal fine detail or two points distinctively apart
Refractive index?
the amount the light bends of the material usually air between the objective lens and the slide
focal point?
That is where an image is formed
parfocal?
when a subject is in focus with one lens it will be in focus with all the other lenses
How do you calculate total magnification?
Take the power of the objective and multiply by the power of the eye piece (ocular lense) usually 10X
so OBJECTIVE x OCULAR
purpose of immersion oil?
Reduces refraction
Before using oil immersion you should have your lens in?
HIGH POWER
always focus with ___ first?
LOW POWER
Ocular lens
remagnifies the image formed by the objective lens
Body tube
transmits the image from the objective lens to the ocular lens
