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Honors Biology (use of the microscope) Flashcards on Untitled_1, created by mary1327 on 23/09/2013.
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Flashcards by mary1327, updated more than 1 year ago
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Created by mary1327 almost 11 years ago
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Question Answer
When transporting the microscope, how should you carry it? Close to your body with one hand on the arm and the other on the base
What are the steps to getting it ready for use? 1. remove dust cover 2. plug it in 3. arrange the excess cord in a manner that will prevent your from tripping on it and knocking over the microscope
Which power objective should you start with? the lowest which is usually 4X since: 1. it is easiest to focus on a lower power. 2. it has the shortest objective lens so there is less chance of scratching the lens when situating and removing the slide
What is the part that you look through called? the eyepiece lens located at the top of the microscope
What are the usual powers of the eyepiece lens? 10X or 15X
What part connects the eyepiece to the objective lenses? tube
What is the tube? It connects the eyepiece to the objective lenses
What part supports the tube and connects it to the base? arm
what is the arm? It supports the tube and connects it to the base
What is the steady light source used in place of a mirror? illuminator
what is the illuminator? the steady light source (110 volts) used in place of a mirror
If a microscope has a mirror, how does it illuminate? It is used to reflect light from an external light source up through the bottom of the stage
What is the nosepiece or turret? the part that holds tow or more objective lenses and can be rotated to easily change power
what part holds two or more objective lenses and can be rotated to easily change power revolving nosepiece or turret
What is the part where you place your slides? the stage
what is the stage? the flat platform where you place your slides
how do the slides stay in place on the stage? Stage clips hold the slides in place
what is a mechanical stage? the platform where you place your slides that can move the slide around my turning two knobs - one moves it left and the other moves it right
What are the powers of the objective lenses? Usually, you will find 3 or 4 objective lenses on a microscope - 4x, 10x 40X and 100X
How do you figure out the total magnification? eyepiece power times objective lenses: 10 x 4 = 40 15x10=150
what do you call the part that holds 2 or more objective lenses and can be rotated to easily change the power? revolving nosepiece of turret
what is the revolving nosepiece or turret? the part that holds two or more objective lenses that can be rotated to easily change power
What part is an adjustment that determines how close the objective can get to the slide? rack stop
what is the rack stop? an adjustment that determines how close the objective lens can get to the slide. Since it is set as at the factory and keeps the student from cranking the high power objective lens into the slide and breaking it, you would only need to adjust this if you were using very thin slides and weren't able to focus on the specimen at high power
what is the rotating disk under the stage that has different sized holes used to vary the intensity and size of the cone of light that is projected upward into the slide? diaphragm or iris
what is the diaphragm or iris? the rotating disk under the stage that has different sized holes used to vary the intensity and size of the cone of light that is projected upward into the slide
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