E-commerce E-commerce or Electronic Commerce is a modern way of business. Transaction in case of buying or selling a product or service through electronic devices and internet connection is E-commerce. In E-commerce, the buyer and seller can not only communicate with each other but also the buyer can pay and the seller can receive payments …
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Information Processing Cycle: The task of computer, in low level, is to process given data to produce information. Computer takes data, then processes the data as per being instructed and then can either output the generated information to user or store the information to storage or can do both. The generated information can be treated …
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Flux If is a vector field, then the flux through any face is defined as the scalar product of the vector area of the face and the vector . That is, Flux = (component of velocity normal to the face) × (area of the face) The amount of flux per unit area is …
Electric Charge The reason present in a material causes static electricity, electric field in the material and the material become able to attract other materials is called electric charge. It may be positive or negative. Unit of electric charge is coulomb (C).
Dextrorotatory and laevorotatory substances are optically active substances. Dextrorotatory substances Substances which rotate the plane of polarization of the light towards the right are known as dextrorotatory substances. Laevorotatory substances Substances which rotate the plane of polarization of the light towards the left are known as laevorotatory substances.
Optical activity Optical activity is the ability of a substance to rotate the plane of polarization of plane polarized light. Substances which have this ability are called optically active substance. Tartaric acid is an example of optically active liquid. Explanation When a polarizer and analyzer are crossed, no light emerges out of the analyzer. When …
Nicol prism Nicol prism was invented by William Nicol in 1828. It is an optical device used for producing and analyzing plane polarized light. The nicol prism is made in such a way that it eliminates one of the two rays by total internal reflection. It is generally found that it eliminates the ordinary ray …
Phase velocity Phase velocity is the velocity with which a plane progressive wave front travels forward. Phase velocity is symbolized by . It has a constant phase = Group velocity The group velocity () is the speed with which the point of reinforcement of the resultant wave travels. The group velocity is different from the individual …
Delivery: Delivery refers to the way a packet is handled by the underlying network under the control of the network layer. Various delivery concepts are explained below. Connection Types: Delivery of a packet in the network layer is accomplished by either a connection oriented service or a connection-less service. Connection Oriented Service: At first a …
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Connecting Devices: Devices that are used to connect other devices are called connecting devices. That is, connecting device is a device that connects. There are 4 types of connecting devices. They are as follows, i. Repeater: A repeater is a device that receives signals and before it become too weak or corrupted the repeater regenerates …
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