The Microscope.PPT

The Microscope Mr. Ryan 6th Grade The History Many people experimented with making microscopes Was the microscope originally made by accident? (Most people were creating telescopes) The first microscope was 6 feet long!!! The Greeks Romans used “lenses” to magnify objects over 1000 years ago. The History Hans and Zacharias Janssen of Holland in the 1590’s created the “first” compound microscope Anthony van Leeuwenhoek and Robert Hooke made improvements by working on the lenses The History How a Microscope Works How a Microscope Works The Parts of a Microscope Body Tube The body tube holds the objective lenses and the ocular lens at the proper distance Nose Piece The Nose Piece holds the objective lenses and can be turned to increase the magnification Objective Lenses The Objective Lenses increase magnification (usually from 10x to 40x) Stage Clips These 2 clips hold the slide/specimen in place on the stage. Diaphragm The Diaphragm controls the amount of light on the slide/specimen 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 Ocular Lens/Eyepiece Magnifies the specimen image Arm Used to support the microscope when carried. Holds the body tube, nose piece and objective lenses Stage Supports the slide/specimen Coarse Adjustment Knob Moves the stage up and down (quickly) for focusing your image Fine Adjustment Knob This knob moves the stage SLIGHTLY to sharpen the image Base Supports the microscope Magnification Magnification To determine your magnification…you just multiply the ocular lens by the objective lens Ocular 10x Objective 40x:10 x 40 = 400 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 kn