The purpose of the condenser lens is
to focus the light onto the specimen
. Condenser lenses are most useful at the highest powers (400x and above). Microscopes with a stage condenser lens render a sharper image than those with no lens (at 400x). What is the Abbe condenser?
What is the function of the condenser lens on a microscope?
The substage condenser
gathers light from the microscope light source and concentrates it into a cone of light that illuminates the specimen with uniform intensity over the entire viewfield
.
What is the significance of condenser lens quizlet?
The purpose of the condenser lens is
to focus the light onto the specimen
. Used to vary the intensity and size of the cone of light that is projected upward into the slide.
What is the condenser on a microscope quizlet?
Condenser.
Small non magnifying lens located beneath the stage that concentrates the light on the specimen
. The condenser may have a knob that raises and lowers the condenser to vary the light delivery. Generally, the best position is close to the inferior surface of the stage.
What is the function of the objective lens quizlet?
4 objective lenses: 4x (scanning power), 10x (low power) 40x (high power), & 100x (oil immersion). The function of the objective lenses is
to magnify the specimen & to produce a magnified real inage.
What two adjustments can be made to the condenser?
| Question Answer | What two adjustments can be made to the condenser? what effect do these adjustments have on the image? Answer: the condenser high and diaphragm can be adjusted. illumination of the specimen is increased when the condenser is raised and the diaphragm is opened. |
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At what position should you keep your microscope substage condenser lens?
In general, at what position should you keep your microscope's substage condenser lens? It should be
kept half way between the body and the base
.
Why would you adjust the condenser on a microscope?
The condenser lens adjustment knob is located below the specimen stage and on the left side. It
allows the user to move the condenser lens assembly up or down
. As you move the condenser lens up, closer to the specimen, it concentrates (condenses) more light on your specimen.
What are the 3 objective lenses on a microscope?
Most compound microscopes come with interchangeable lenses known as objective lenses. Objective lenses come in various magnification powers, with the most common being
4x, 10x, 40x, and 100x
, also known as scanning, low power, high power, and (typically) oil immersion objectives, respectively.
How do you adjust the condenser on a microscope?
When installing the microscope condenser,
rotate the coarse focus knob (1) to move the stage to its
highest position. Most compound light microscopes have a small knob (2) to raise and lower the condenser holder. Lower this holder so the condenser can slide into the holder below the stage.
What is the function of the condenser in a brightfield microscope quizlet?
The condenser
receives the light from the source in the base and it focuses it into a cone on the specimen
. The knob located under the condenser and to the left moves it up and down to adjust the amount of light striking the specimen.
What part of a microscope is used to regulate the intensity of light entering the condenser?
The condenser is equipped with
an iris diaphragm
, a shutter controlled by a lever that is used to regulate the amount of light entering the lens system.
Which of the following parts of a microscope is used for precise focusing quizlet?
small knob that moves the stage or objective lens
a very small distance and is used for precision focusing.
What is the function of objective lens?
An objective lens is the most important optical unit that
determines the basic performance/function of an optical microscope To provide an optical performance/function optimal for various needs and applications
(i.e. the most important performance/function for an optical microscope), a wide variety of objective lenses …
What are two functions of the ocular eyepiece lens?
Ocular Lens – The ocular lens, or eyepiece,
magnifies the image
. It contains a measuring scale called and ocular micrometer. The ocular micrometer has no units. Revolving Nose Piece – Several objective lenses of varying magnification and numerical aperture are mounted on the revolving nosepiece.
What is the purpose of the microscope quizlet?
Terms in this set (33) The goal of microscopy is
to create a magnified image of objects too small to be seen with the eye alone
. Brightfield microscopes use a combination of glass lenses and light to view the specimen. Using an oil immersion objective lens allows for higher magnification.
