Introduction to Financial Accounting and Reporting

General Chemistry

Introduction to Biology

A compound microscope is an optical instrument used for viewing very small objects, such as cells, which are invisible to the naked eye. It consists of several components that work together to magnify the object being viewed. Here is a step-by-step guide to the various components of a compound microscope: 1. **Eyepiece (Ocular Lens):** The eyepiece is the part of the microscope you look through. It typically contains a lens that magnifies the image. The magnification of the eyepiece is usually 10x or 15x. 2. **Body Tube (Head):** The body tube connects the eyepiece to the objective lenses. It is the pathway through which light travels to reach the eyepiece. 3. **Arm:** The arm connects the body tube to the base of the microscope. It is used to carry the microscope. 4. **Objective Lenses:** These are the primary lenses that magnify the specimen. A compound microscope typically has three or four objective lenses with different magnifications, commonly 4x, 10x, 40x, and 100x. They are mounted on a rotating turret to allow for changes in magnification. 5. **Stage:** The stage is the flat platform where the specimen to be viewed is placed. It usually has clips to hold the slides in place. 6. **Stage Clips:** These clips hold the slides in place on the stage. 7. **Illuminator:** A steady light source (often an LED or halogen lamp) used to shine light through the specimen for clear viewing. 8. **Condenser:** The condenser is a lens system located below the stage that focuses the light onto the specimen. It often includes a diaphragm to control the amount of light reaching the specimen. 9. **Diaphragm or Iris:** This component is used to vary the intensity and size of the cone of light that is projected upward into the slide. It is usually part of the condenser. 10. **Coarse Focus Knob:** This larger knob is used for focusing the microscope. It moves the stage up and down to bring the specimen into the general focus. 11. **Fine Focus Knob:** This smaller knob is used for fine-tuning the focus of the specimen after coarse focusing has been completed. 12. **Base:** The base supports the microscope and houses the illuminator. Here is a simple diagram labeling the parts of a compound microscope: ``` Eyepiece | Body Tube | Arm | Objective Lenses | Stage | Condenser | Diaphragm | Coarse and Fine Focus Knobs | Base ``` When using a compound microscope, light from the illuminator passes through the condenser and is focused through the specimen on the stage. The objective lens closest to the specimen magnifies the image, which is then further magnified by the eyepiece lens. The viewer looks through the eyepiece to see the magnified image of the specimen. The coarse and fine focus knobs are used to get a clear image of the specimen.

Question

Label the various components of a compound microscope, including the objective lens, eyepiece, and s...

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