Compound microscope

Definition

A compound microscope is an optical instrument that uses multiple lenses to magnify small objects, making them visible to the human eye. It is commonly used in laboratories for observing microorganisms and cell structures.

5 Must Know Facts For Your Next Test

1. Compound microscopes typically have an objective lens and an ocular lens for magnification.
2. The total magnification is calculated by multiplying the magnifying power of the objective lens by that of the ocular lens.
3. Compound microscopes often include a condenser lens and diaphragm to focus light on the specimen.
4. They generally require thin, transparent samples that are placed on glass slides for viewing.
5. Most modern compound microscopes have a revolving nosepiece to switch between different objective lenses.

Review Questions

• What two types of lenses are used in a compound microscope?
• How do you calculate the total magnification of a compound microscope?
• Why is it important for samples viewed under a compound microscope to be thin and transparent?

Related terms

Objective Lens:

A lens located near the specimen that provides initial magnification.

Ocular Lens:

Also known as the eyepiece, it further magnifies the image formed by the objective lens.

Condenser Lens:

A lens that focuses light onto the specimen to improve image clarity.