Compound Microscope (Zoology Laboratory & Lecture)

• What object magnifies small objects and produces images with definitive structures that are identifiable?

  Microscope
• What part of a microscope is used for adjustments and support?

  Mechanical Parts
• What part of a microscope is used to enlarge the specimen, the set of lenses, or the lens system?

  Optical Parts
• What part of a microscope is used to provide light?

  Illuminating Parts
• It is the basal, horseshoe-shaped structure that provides support to all the remaining parts of the microscope.

  Base
• It is a small, strong vertical projection developing from the foot or base of the microscope.

  Pillar
• It is a curved and strong structure used for handling the entire instrument.

  Arm
• It is a flat rectangular plate attached to the lower end of the arm where a slide or object is placed and studied. A hole is present in the center for light rays to pass through the slide.

  Stage
• It is two clips that are attached to the upper part of the stage that are used for holding the slide in position.

  Stage Clip
• It is the tubular, hollow part attached to the upper part of the arm of the microscope that can be moved up and down with the help of adjustment knobs.

  Body Tube
• It is the cylindrical structure on top of the body tube that holds the ocular lens.

  Draw Tube
• It is a circular and revolving metallic part attached to the lower end of the body tube and has holes in which objective lenses can be fitted.

  Revolving Nosepiece
• It lies atop the revolving nosepiece and keeps dust from settling in the objectives.

  Dust Shield
• It is a large-sized knob used to move the body tube up and down for bringing the object into focus.

  Coarse focus knob
• It is a small-sized knob used for fine and sharp focusing of the object. Exact focusing is done by this knob.

  Fine focus knob
• It is a small tube consisting of lenses that indicate the relative power of the magnification.

  Ocular/Eyepiece
• It is the objective used for the initial location of the specimen and has 4x magnification.

  Scanning objective
• It is the objective that may also be used for the initial location of the specimen, magnifies the specimen 10x, and views it at a larger field.

  Low Power objective
• It is the objective to obtain greater magnification and view detailed structures of the specimen.

  High Power objective
• It is the objective used for magnification of extremely small specimens, such as bacterial cells, and uses a drop of oil on the slide for better refraction.

  Oil Immersion objective
• It is a steady light source (110 volts in the US) that shines up through the slide.

  Illuminator/Lamp
• It reflects light rays through the object. One side is plain (used with natural light) and the other is concave (used with artificial light).

  Mirror
• This part can be adjusted to vary the intensity that is projected through the slide. As there is no set rule on which setting to use for a particular power, the setting depends on the transparency of the specimen and the degree of contrast you desire in your image.

  Iris diaphragm
• This is a lens that concentrates light on the specimen.

  Condenser
• It is determined by multiplying the power of the ocular by the power of the objective in use.

  Magnification
• What is the most common method used for both the detection and characterization of microorganisms that are vital in magnifying microorganisms to be visualized by the naked eye?

  Microscopy
• What is the measuring unit for bacteria?

  Micrometer
• What is a measure of relative velocity at which light passes through a material?

  Refractive index
• What type of microscope with single-lens microscope with only 1 lens with a magnification of 200x-300x made by Anton Van Leeuwenhoek (1672)?

  Simple microscope
• What type of microscope with two sets of lenses with a magnification of 100x-200x was made by Zacharias Janssen and his son, Hans Janssen (1590)?

  Simple Compound Microscope
• What type of microscope with oil lamps and condensing lenses for illumination was developed by Robert Hooke (1665)?

  Laboratory Compound Microscope
• What type of microscope with more than 1 lens, 2 sets of lenses (eyepiece and objectives), and 3-5 objective lenses?

  Modern Compound Microscope
• What type of microscope magnifies objects up to 300,000x that do not use lenses, but electrons to enlarge the image?

  Electron microscope
• What type of microscope is used for studying bacteria in a living state/unstained and fixed stained preparation with two general parts: mechanical and optical?

  Bright field/Compound microscope
• What type of microscope uses a special condenser that produces a hollow cone of visible light?

  Dark field microscope
• What type of microscope makes use of special lenses, condensers, and filters?

  Phase contrast microscope
• What type of microscope makes use of ultraviolet light to view the object using a certain dye applied to the specimen?

  Fluorescence microscope
• What type of microscope makes use of UV light passing visible light through quartz or reflecting lenses?

  Ultraviolet light microscope
• What is the screw at the sides of the pillar that is used to tilt the microscope?

  Inclination Joint/Rack Stop
• What is the hole in the middle of the stage of the microscope where light is transmitted from the lamp?

  Aperture