microscope Word Scramble

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Question	Answer
clean the microscope	use only special grit-free lens paper to clean the lenses. use circular motion to wipe lenses. clean before and after use
begin focusing process	with the lowest powered objective lens in position changing to the higher-power lenses as necessary
use coarse adjustment knob	only with the lowest power objective lens
coverslip	always use w wet mount preparations
remove parts?	never remove parts from the microscope. inform your instructor of any mechanical problems that arise
storing	remove the slide from the the stage, rotate the lowest power objective lens into position, wrap the cord neatly around the base and replace dust cover n return microscope to cabinet
microscope	instrument of magnification
magnification is achieved	through the interplay of two lenses---the ocular lens and the objective lens
objective lens	magnifies the specimen to pro duce a real image that is projected to the ocular.
real image	projected to the ocular
virtural image	magnified image that your eyes see
total magnification (TM)	equal to the power of the ocular lens multiplied by the power of the objective lens used. ex 10 x 45 equals 450 TM or 10 x 45 TM
resolution	the ability to discriminate two close objects as separate
base	bottom of the ms. provides a sturdy flat surface to support and steady the ms
substage light	located in the base. the light from the lamp passes directly upwardthrough the ms
light control knob	located on the base or arm. this dial allows u to adjust the intensity of the light passing through the specimen
stage	the platform that the slide rests on while being viewed. the stage has a hole in it to allow light to pass through the stage and through the specimen
mechanical stage	holds the slide in position for viewing and has two adjustable knobs that control the precise movement of the slide
condenser	small nonmagnifying lens located beneath the stage that concentrates the light on the specimen. may have a light that raises n lowers to vary the light
condenser	best position is close to the inferior surface of the stage
iris diaphragm lever	a shutter in the condenser that can be controled by a lever to adjust the the amount of light passing through the condensor
iris diaphragm lever	can be moved to close the diaphragm and improve contrast.
iris diaphragm lever	if your field of view is too dark, you can open the diaphragm to let more light in
coarse adjustment knob	allows u to make large adjustments to the height of the stage to initally focus focus your specimen
fine adjustment knob	used for precise focusing once the initial coarse focusing has been completed
head	attaches to the nosepiece to support the objevtive lens system. it also provides for attachment of the eyepieces which house the ocular lens
arm	vertical portion of the ms that connects the base to the head.
nosepiece	rotating mechanism connected to the head
nosepiece	carries three or four objective lenses and permits positioning of the lenses over the hole in the stage
objective lenses	lenses are attached to the nosepiece.
compound microscope	has four objective lenses scanning 4x, low power 10x, high power 40x, oil immersion 100x
ocular lens (es)	binocular ms will have two lenses located in the eyepiece at the superior end of the head
ocular lenses	most have a magnification power of 10x
parafocal	ms feature most lab ms's have. the slide should be in focus (or nearly so) at the higher magnifications once you have properly focused at the lower magnification
field	the area u see through the ms
working distance	how far is the bottom of the objective lens from the surface of the slide.
ms field	decreases with increasing magnification
lens for storage	rotate the lowest powered objective lens into position
beginning to focus	use the lowest power of lens
virtual image	the enlarged image u see
resolution	(resolving power) the ability to discriminate two close objects as separate
working distance	the distance from the bottom of the objective lens to the surface of the slide
field	the area of the slide seen when looking through the microscope
parafocal	after focussing in low power, you only need to use the fine adjustment to focus at the higher powers
prepare a wet mount	a) place the object in a drop of water (or saline) on a clean slide b) hold a coverslip at a 45 degree angle w the fingertips; and c) lower the coverslip slowly

Created by: pkts68