____ is how much the microscope can zoom in. ____ is how clear the image is. The big knob is the ____ focus, which alters the magnification (that is your zoom), the little knob is the fine focus, which alters resolution (making it ____). To use a light ____, you must first select the ____ ____ lens and make sure the stage is all the way down. Your sample must be thin enough to let ____ pass through. We use tweezers to peel a very thin layer off the inside of the piece of onion and lay it ____ on the sample ____. To help our visualisation of the sample we add a ____/dye. In the onion cell practical, you would use a few drops of iodine. Then the cover slip is put on top of the sample, ensuring no air bubbles. Place the slide on the stage and secure by the ____ ____ Look through the ____ Use the coarse ____ knob, to bring the image into focus. Use the ____ focus knob, to make the image ____ and clear. Change to a ____ ____ objective lens (if needed) and then repeat above.

Light Microscopy

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