Question: Who among the following made the first the compound microscope?
Options:
William Gilbert
Zacharias Janssen
John Harington
Galileo Galilei
-A Dutch father-son team named Hans and Zacharias Janssen invented the first so-called compound microscope in the late 16th century when they discovered that if they put a lens at the top and bottom of a tube and looked through it, objects on the other end became magnified.
-A compound microscope is a high-power (high magnification) microscope that uses a compound lens system.
-A compound microscope has multiple lenses: the objective lens is compounded (multiplied) by the eyepiece lens to obtain a high magnification.
-Higher magnification is achieved by using two lenses rather than just a single magnifying lens.
🔴Additional Information:
✏️Components of the compound microscope:
-Eyepiece: Also known as the ocular, is the lens that you look through at the top of the microscope. Standard eyepieces typically have a 10x magnification power.
-Eyepiece Tube: The eyepieces are held in place above the objective lens by the Eyepiece Tube. A diopter adjustment ring is frequently included in binocular microscope heads to account for probable irregularities in human eyesight in one or both eyes. A diopter is not required when using a monocular (single eye) microscope.
-Objective Lenses: These are the primary optical lenses on a microscope.
-Nosepiece: It houses the objectives. The objectives are exposed and are mounted on a rotating turret so that different objectives can be conveniently selected.
-Coarse and Fine Focus knobs: These are used to focus the microscope.
-Stage: The specimen to be examined is put on the stage. When working at greater magnifications, when careful motions of the specimen slide are necessary, a mechanical stage is used.
-Stage clips: When there is no mechanical stage, stage clips are employed. To observe different areas of the specimen, the viewer must manually move the slide.
-Aperture: The opening in the stage through which the base (transmitted) light reaches the stage is known as an aperture.
-Illuminator: It is a light source for a microscope that is normally situated in the microscope's base. Low-voltage halogen bulbs with continuous variable illumination control are used in most light microscopes.
-Condenser: The light from the illuminator is collected and focused on the specimen by the condenser. It's usually found beneath the stage, along with an iris diaphragm.
-Iris Diaphragm: The amount of light that reaches the specimen is controlled by the Iris Diaphragm. It's beneath the stage and above the condenser. An Abbe condenser with an iris diaphragm is standard on most high-end microscopes.
-Condenser Focus Knob: It adjusts the lighting focus on the specimen by moving the condenser up or down.