Microscopes

• Resolution : Smallest distance between two points that can still be seen as two points , in other words, as separate identities
• If an image has a high resolution , it means that it has a higher amount if pixels
• Magnification (to magnify) : How many time you have increased the image from the actual specimen
• Equation of magnification -> Magnification =Size of the image / size of the actual object
• The light microscopes were invented around 1590
• The light microscopes allow us to see the fine details of an object , like cells and sometimes bigger organelles
• The electron microscope e invented in 1931
• The electron microscope use beans of electrons while the light microscope uses rays/beans of light
• The electron microscope has a large depth of field , it allows more specimen to be focused at one time
• The electron microscope has a much higher resolution and magnification
• While using a light microscope you should always use the smallest lens first
• Field of view : How much you're able to see of a magnified sample at a specific level and is displayed in distance unit
• While using a microscope you should add water (like a drop ) to the specimen for it to expand
• While using a microscope you may want to add a stain to the specimzen on the slide so that it "expand" the particles and make it easier to see
• While using a microscope , you should press down on the cover slip gently so as not to smash the sample too much
• Eyepiece lens : It is a lens that is closest to your eye .It usually have a magnification of x10
• Objective lens : There are three lens of different strenghts which can be used to magnify the image more clearly
• Stage : This is the pplace where you put a microscope slide . Clips hold the slide in place
• Diaphragm : This holds the eyepiece lens above the stage
• Light: Control the amount of light that goes onoto the microscope slide
• Base : The light source projects light onto the microscope slide.It can be a mirror or an electric bulb
• Arm : This is the very heavy part that keeps the microscope into place from falling over
• Fine focus knob : This is used to focus the image so its very sharp and clear
• Coarse focus knob : This is used to focus the image so that you cans ee it clearly
• the light microscope was invented by Antoni van Leeuwenhoek