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Amwoga KhalwaleWhat Is Phase Contrast Microscopy? Phase-contrast microscopy was first described in 1934 by Dutch physicist Frits Zernike. It a technique used for gaining contrast in a translucent specimen without staining the specimen. The optics of the microscope converts the differences in the refractive index of the specimen into brightness differences. This causes the translucent object … Read more
What Is Soil Texture? Soil texture refers to the proportion of sand, slit and clay sized particles that make up the mineral fraction of the soil. The primary particles of sand, silt and clay make up the inorganic solid phase of the soil. These particles often become aggregate together with each other and other parts … Read more
What Is Electrical Resistance? Electrical resistance is the hindrance to the flow of charge through an electric circuit. Resistance is represented by the uppercase letter R. The standard unit of resistance is the ohm, sometimes written as a word and sometimes symbolized by the uppercase Greek letter omega. In general, when the applied voltage is … Read more
A control system is a system of devices or set of devices that manages, commands, directs or regulates the behavior of other devices or systems to achieve desired results. There are two main types of control system. They include: Open loop control system Closed loop control system What Is Open Loop Control System? An open … Read more
LED (Light Emitting Diode) A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. Early LEDs produced only red light, but modern LEDs can produce several different colors including red, green and blue … Read more
What Is Coining? Metal coining is a forging process by which very fine and intricate details can be created on the surface of a workpiece. Coining may be used to control surface quality and detail on parts. Metal coining is often a finishing process for manufactured products. This is a flashless, precision forging operation that … Read more
What Is Length? In geometric measurement, length is the most extended dimension of an object. It is used to quantify distance from one point to another and is the longest in the three dimensions of an object. In the International System of Quantities, length is a quantity with dimension distance. In most systems of measurement … Read more
What Is A Covalent Bond? A covalent bond also referred to as a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is … Read more
What Are Combinational Circuit (CC)? Combinational circuits are circuits made up of inputs, outputs and two or more logic gates. A logic gate is a basic building block of any electronic circuit. The circuits have no memory, timing or feedback loops, there operation is instantaneous. A combination logic circuit performs an operation assigned logically by … Read more
What Is Fork ( )? Fork is a function in UNIX operating system that is used to generate a duplicate of particular process by creating two simultaneous executing processes of a program. These two processes are typically called the ‘’parent’’ and ‘’child’’ processes. They use multitasking protocols to share system resources. When fork creates a … Read more