Parts of the Microscope questions with 100% correct answers graded A+

Parts of the MicroscopeArm - correct answer Vertical portion of the microscope that connects the base and the head Head - correct answer Attaches to the revolving nosepiece to support the objective lens system. It also provides for attachment of the eyepieces which house the ocular lenses Base - correct answer The bottom of the microscope. Provides a sturdy flat surface to support and steady the microscope Light source or substage light - correct answer Located in the base. The light from the lamp passes directly upward through the microscope Light control knob - correct answer Located on the base or arm. This dial allows you to adjust the intensity of the light passing upwards through the specimen Stage - correct answer The platform that the slide rests on while being viewed. The stage has a hole in it to allow light to pass through the stage and through the specimen Mechanical stage - correct answer Holds the slide in position for viewing and has two adjustable (x/y adjustment or coaxial) knobs that control the precise movement of the slide Condenser - correct answer Small non-magnifying lens located beneath the stage that concentrates the light on the specimen. The condenser may have a knob that raises and lowers the condenser to vary the light delivery. Generally, the best position is close to the inferior surface of the stage Iris diaphragm lever - correct answer The iris diaphragm is a shutter within the condenser that can be controlled by a lever to adjust the amount of light passing through the condenser. The lever can be moved to close the diaphragm and improve contrast. If your field of view is too dark, you can open the diaphragm to let in more light Coarse adjustment knob - correct answer This knob allows you to make large adjustments to the height of the stage to initially focus your specimen Fine adjustment knob - correct answer This knob is used for precise focusing once the initial coarse focusing has been completed Nosepiece - correct answer Rotating mechanism connected to the head. Generally, it carries three or four objective lenses and permits positioning of these lenses over the hole in the stage Objective lenses - correct answer These lenses are attached to the nosepiece. Usually, a compound microscope has four objective lens: scanning (4x), low-power (10x), high-power (40x), and oil immersion (100x). Typical magnifying powers for the objectives are listed in parentheses Ocular lenses - correct answer Binocular microscopes will have two lenses located in the eyepieces as the superior end of the head. Most ocular lenses have a magnification power of 10x. Some microscopes will have a pointer and / or reticle (micrometer) which can be positioned by rotating the ocular lens Stage opening - correct answer Allows light upwards toward the specimen for better viewing via the condenser Stage lock control - correct answer Allows stage to be locked in a single position Slide holder - correct answer Holds the slide in place for viewing the specimen Graduated locator markings - correct answer Positioned on the mechanical portion of the stage allow the microscopist to note the location of important specimen details, allowing easy return to the area for additional observation or photomicrography X-Y transitional knobs - correct answer Moves the stage forward & backwards and up & down Diopter adjustment - correct answer Useful as a means to change focus on one eyepiece so as to correct for any difference in vision between your two eyes