The Microscope 6 th Grade. How a Microscope Works Convex Lenses are curved glass used to make microscopes (and glasses etc.) Convex Lenses bend light.

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Presentation transcript:

The Microscope 6 th Grade

How a Microscope Works Convex Lenses are curved glass used to make microscopes (and glasses etc.) Convex Lenses bend light and focus it in one spot.

How a Microscope Works Ocular Lens (Magnifies Image) Objective Lens (Gathers Light, Magnifies And Focuses Image Inside Body Tube) Body Tube (Image Focuses) Bending Light: The objective (bottom) convex lens magnifies and focuses (bends) the image inside the body tube and the ocular convex (top) lens of a microscope magnifies it (again).

The Parts of a Microscope

Body Tube Nose Piece Objective Lenses Stage Clips Diaphragm Light Source Ocular Lens Arm Stage Coarse AdjCoarse Adj. Fine Adjustment Base Skip to Magnification Section

Body Tube The body tube holds the objective lenses and the ocular lens at the proper distance Diagram

Nose Piece The Nose Piece holds the objective lenses and can be turned to increase the magnification Diagram

Objective Lenses The Objective Lenses increase magnification (usually from 10x to 40x) Diagram

Stage Clips These 2 clips hold the slide/specimen in place on the stage. Diagram

Diaphragm The Diaphragm controls the amount of light on the slide/specimen Turn to let more light in or to make dimmer. Diagram

Light Source Projects light upwards through the diaphragm, the specimen and the lenses Some have lights, others have mirrors where you must move the mirror to reflect light Diagram

Ocular Lens/Eyepiece Magnifies the specimen image Diagram

Arm Used to support the microscope when carried. Holds the body tube, nose piece and objective lenses Diagram

Stage Supports the slide/specimen Diagram

Coarse Adjustment Knob Moves the stage up and down (quickly) for focusing your image Diagram

Fine Adjustment Knob This knob moves the stage SLIGHTLY to sharpen the image Diagram

Base Supports the microscope Diagram

Magnification

To determine your magnification…you just multiply the ocular lens by the objective lens Ocular 10x Objective 40x:10 x 40 = 400 Objective Lens have their magnification written on them. Ocular lenses usually magnifies by 10x So the object is 400 times “larger”

Caring for a Microscope Clean only with a soft cloth/tissue Make sure it’s on a flat surface Don’t bang it Carry it with 2 HANDS…one on the arm and the other on the base

Carry a Microscope Correctly

Using a Microscope Start on the lowest magnification Don’t use the coarse adjustment knob on high magnification…you’ll break the slide!!! Place slide on stage and lock clips Adjust light source (if it’s a mirror…don’t stand in front of it!) Use fine adjustment to focus

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