Rotate the objective lenses so that the low-power, eg x10, is in line with the stage. Image caption, Turn the coarse focus so that the stage is as close to the objective lens as possible. You should ...

Cells are tiny, so we use microscopes to see their details. A slide is a thin piece of glass used to hold objects which are examined under a microscope. Peel a thin layer of cells from an onion. Place ...