AP BIOLOGY

Detailed explanation-1: -Start by rotating the objective lens to lowest power. Place a slide on the stage, label side up, with the coverslip centered. On LOW POWER ONLY, use the coarse focus knob to get the object into focus. If you cannot see anything, move the slide slightly while viewing and focusing.

Detailed explanation-2: -Why do you need to start with 4x in magnification on a microscope? The 4x objective lens has the lowest power and, therefore the highest field of view. As a result, it is easier to locate the specimen on the slide than if you start with a higher power objective.

Detailed explanation-3: -Low Power Objective (10X): This next shortest objective is probably the most useful lens for viewing slides. Almost any feature you need to observe in this course can be located with the 100X total magnification this objective provides.

Detailed explanation-4: -High Power Lens (40x) The high power lens is identifiable by a blue strip around the lens housing. Most compound light microscopes are sold with a 40x magnification high power lens, although this is not always the case. You may get a 32x or 60x magnification high power lens, for example.