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Micro - Ch. 2 ppt

QuestionAnswer
3 types of Microscopes Simple microscopes Compound microscopes Electron microscopes
basic unit of length in the metric system meter (m)
The sizes of bacteria and protozoa are usually expressed in terms of..? micrometers (µm)
Microorganisms vary in size... 1µm to 200 nm
Visible light represents a narrow group of wavelengths between about 400-700 nm
The limit of a microscope is referred to as the...? resolving power or resolution of the instrument
Resolution is ...? the ability of the lenses to distinguish two points
The limit (smallest) of resolution for a human eye is..? 0.2 micrometer
Lamda is ..? the wavelength of light in nm
NP is the...? numerical aperture of objective lens.
The shorter the wavelength ..? the greater the resolving power.
The wider the angle of lens...? the more capable of receiving light , the greater its resolving power
What is Refractive index? the light-bending ability of a medium.
1mm Louse bug (tick), bread mold
100 micrometer (um) Colonial Alga, Amoeba
10 micrometer (um) Red blood cell, white blood cell
1 micrometer (um) Rickettsia bacteria
Created by: user-2039724
 

 



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