Lesson 5 Compound Microscope Flashcards
has high magnification but lower resolution resulting to a less sharp image
compared to some advanced types of microscopes.
Compound microscope
is the
ability of a microscope to see a tiny object 1000 times.
Magnification of a microscope
on the other hand is the ability to
distinguish details or to see two close objects as two distinct objects.
Resolution
Attached to a rotating nose piece, or turret, at the base of the body tube are a group of 3 or 4 objectives. focus the light that comes through the specimen, up the body tube, and through the oculars.
Objective lens
has magnifying power of 4x
Scanning power
has magnifying powe of 10X
Low power
has magnifying powe of 40x
High power
has magnifying powe of 100X.
oil immersion
The surface or platform on which you place the microscope slide
stage
Is an opening in the center of stage
stage aperture
microscopes that has a movable stage
mechanical stage.
The area under the stage, may contain a diaphragm, a condenser, or both.
.
Substage
regulates the amount of light passing from the light source through the specimen and through the lens system of the microscope.
Diaphragm
The light source, usually an electric lamp, which transmits light through a translucent object for viewing and controlled by an on/off switch.
The illuminating system
You can control the amount of light entering the specimen by adjusting what?
diaphragm
The flat side of the mirror is usually used with what?
the scanning and low-power objectives
The concave mirror is used with what?
higher power objectives
The light source for the mirror
.
a lamp
The light source for the mirror
.
a lamp
can be used as light source but it is not preferred because its intensity is too variable.
natural light
. You can focus your microscope by using this
Coarse and fine adjustment knob
Uses an ultraviolet light source to expose a specimen stained with fluorescent dye resulting in an emission of longer wavelength of light.
Fluorescent microscopes
. utilizes a beam of electrons instead of a beam of light used in the light microscopy. The resolution is extremely high, theoretically 100,000 times than that of a light microscope.
Electron microscope
a type of an electron microscope that provides a threedimensional image of the object as well as high resolution.
Scanning electron microscope
another type of electron microscopy by which live organisms can be visualized based on rapid cooling of specimens by deep-freezing in liquid gas and the subsequent formation of carbon platinum replica of the specimen.
Freeze-etching
