With help from the beam of electrons, the electron microscope has the ability to expose the structure of the object itself. For example, an atom could be clearly seen (with full details) with this high technical electron microscope. The electron microscope do have a greater resolving power, which means that it’s possible to see extremely tiny objects with finer details, for example, an atom (10-10). Ordinary high technical electron microscopes are capable of a resolution of 1 nm (one nanometer = 1 x 10-9 m = 1/1,000,000,000). There are two specific variants of electron microscopes; scanning electron microscope (SEM) and transmission electron microscope
The microscope has helped humankind a lot in the medical field in several ways. Scientists and many other professionals can perceive several deadly microorganisms such as virus and bacteria with the help of this instrument. Without this help, scientists wouldn’t be able to be aware of the microorganisms that work or that can affect our human systems.By studying viruses, Medical staff can also find cures for preventing those harmful infections .
1. INTRODUCTION TO MICROSCOPY A microscope is an instrument used to see objects that are very small for the naked eye. The science of examining small objects using such a tool is called microscopy. Microscopic means invisible to the eye except aided by a microscope. 2.
A light microscope (LM) is an instrument that uses visible light and magnifying lenses to verify small objects that are not visible to the naked eyes or in finer detail than the naked eye allows. A light microscope uses two or more lenses to magnify the specimen and it have two sets of lenses which is stage and ocular (Bregman, 1983). Specimens are magnified by the objective lens which is magnified 100 times. The specimen is illuminated by visible light from the light source (the illuminator) that is passed through a condenser, which directs the light rays through the specimen. Resolution (resolving power) is the ability of a microscope to differentiate between two points.
The Sun’s energy which radiates into the Earth’s surface and harnessed by solar cells are composed of broad spectrum of electro-magnetic (EM) waves combined together which form visible light that have different power densities depending on the wavelength of propagation. The particular region of operation for crystalline silicon solar cell is the visible spectrum. Particle nature of light Light consists of energy carrying quantum-mechanical particles called photon. The energy of photon is directly proportional to the frequency of propagation. Energy of photons can be calculated using the equation E = hc/ λ or E(eV) = 1.24 / λ(μm) which give results in electron volts.
Definition of microscope; the microscope is an instrument which is used for magnifying objects that are too small to see with the naked eye; such as cells, bacterias and other microorganisms (particles). It gives an enlarged image of the object. Definition of lens; a piece of glass, or another transparent material, with curved sides. Used for bending light rays (concentrating or dispersing) which passes through. The phenomenon that causes the light to bend when crossing the lens is called refraction.
A stereoscopic microscope has two eyepieces, and both of eyes are used at a time. This helps to make an object looked at more three-dimensional. A stereoscopic view enables fast and safe alignment of knife. It is difficult to manipulate a tool like a knife under a monoscopic microscope. The stereoscopic microscope is used in many fields, including health, medical research, biology, and
What Are Microscope ? A microscope is an optical instrument that allows you to see objects which are not visible to the naked human eye. The most common type of microscope is called the optical microscope, which uses lens to for images from visible light. Another type of microscope is called electron microscope and the way they work is that, they form images from beams of electrons. Zacharias Janssen: The first person to invent a the light microscope is named Zacharias Jansen.
Reflected light microscopes are most commonly used for metallography studies, while transmitted light microscopes are used to examine transparent or semi-transparent materials mainly in biological studies. The main components of light microscope are illumination system, objective lens, eyepiece and movable specimen stage. The differences in properties of the light waves which are reflected from microscopic objects enable one to observe these objects by light microscopy. The light wave changes either in amplitude or phase when it interacts with an object.
Telescopes are used everyday to view distant or far objects, they produce an image bigger than what can be seen with the unaided eye. To do this, telescopes must gather in a lot more light so that dull objects can be more visible and can be observed in greater detail. Refraction is due to light changing speed when moving from different mediums. Light rays travel through different substances at different speeds. The index of refraction is the speed of light that is inside of a vacuum (its maximum speed) divided by speed of light in the medium.