Question

Why is the light microscope called a compound microscope?

Answer 1

Hint: Electron microscopy is a technique for examining objects using electrons. A beam of electrons is used as the electron microscope's energy source. Because the beam has such a short wavelength, it strikes most things in its path, greatly increasing the microscope's resolution. This equipment can detect viruses and some big substances. To avoid contact with deflecting air molecules, the electrons move in a vacuum, and magnets focus the beam on the object to be examined. The technologist views an image that has been made on a monitor.

Complete answer:
The light microscope is a device that magnifies light. The ordinary laboratory light microscope is known as a compound microscope because it has two types of lenses that work together to magnify an object. The ocular is the lens closest to the eye, whereas the objective is the lens closest to the object. A condenser is a device on the base of most microscopes that condenses light rays into a powerful beam. The amount of light that passes through the condenser is controlled by a diaphragm. The light microscope has both coarse and fine settings.

Light is projected via an entrance in the stage, hitting the object, and then entering the target to magnify it. A picture is generated, and this image serves as an object for the ocular lens to remagnify. The magnification acquired by the objective multiplied by the magnification achieved by the ocular lens equals the total magnification available with the microscope.

A compound light microscope typically has four objective lenses: a scanning lens (4X), a low-power lens (10X), a high-power lens (40 X), and an oil immersion lens (40 X) (100 X). With a ten-fold magnifying ocular lens, the total magnifications available with the scanning lens will be 40 X. The low power lens magnifies 100 times, the high power lens magnifies 400 times, and the oil immersion lens magnifies 1000 times. The majority of microscopes have a parfocal lens. When switching from one objective to the next, this word refers to the microscope remaining in focus.

The resolution of a microscope refers to its capacity to distinguish two objects distinctly as independent objects under a microscope. The wavelength of the light used for observation influences the resolution. The wavelength of visible light is around 550 nm, while the wavelength of UV light is around 400 nm or less. As the wavelength of a microscope drops, the resolution of the microscope rises.

As a result, ultraviolet light can be used to identify items that aren't visible to the naked eye. The size of the smallest object that can be seen with a lens is referred to as its resolving power. The numerical aperture of the lens and the wavelength of the light employed determine the resolving power. The numerical aperture (NA) refers to the largest cone of light that can enter the lens; it is inscribed on the objective lens's side.

Note:-
Other light microscopes are available. Microbiologists utilise a variety of microscopes for different reasons, in addition to the common compound microscope. These microscopes allow you to see things that you couldn't see with a light microscope. The head, base, and arm are the three basic structural components of a compound microscope.