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Basic algebra formulas that you can revise anytime and anywhere

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FORMULAS FOR BEGINNER (a+b) ^2= a^2+b^2+2ab (a+b) ^2= (a-b) ^2+4ab (a-b) ^2= a^2+b^2-2ab (a-b) ^2= (a+b) ^2-4ab a^2+b^2= (a+b) ^2-2ab a^2+b^2= (a-b) ^2+ 2ab a^2-b^2= (a+b) (a-b) (a+b+c) ^2= a^2+b^2+c^2+2(ab+bc+ac) (a-b-c) ^2= a^2+b^2+c^2-2(ab-bc+ac) (a+b) ^3= a^3+b^3+3ab(a+b) (a-b) ^3= a^3-b^3+3ab(a-b) a^3+b^3= (a+b) (a^2-ab+b^2) a^3-b^3= (a-b) (a^2+ab+b^2) a^4-b^4= (a^2-b^2) (a^2+b^2) = (a^2+b^2) (a+b) (a-b) a^5+b^5= (a+b) (a^4-a^3b+a^2b^2-ab^3+b^4) a^5-b^5= (a-b) (a^4+a^3b+a^2b^2+ab^3+b^4)
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Things You Probably Didn't Know About Loses In Optical Fibre

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There is some types of losses in Optical fibre.. What is Attenuation? Attenuation is the loss of light energy as the light pulse travels from one end of the cable to the other end. It is called as signal loss or fibre loss. It also decides the number of repeaters required between transmitter and receiver. Attention is directly proportional to the length of cable. α= 10 log10(Pi/Po) [in db/Km] where, Pi = Input power Po= Output power α= Attenuation constant The various losses are: Absorption loss Scattering loss Dispersion loss Bending loss Absorption loss: Absorption of light energy due to heat of ion impurities results in dimming of light at the end of fibre. 1.  Intrinsic absorption : It is caused by the interaction with one or more components of glass. It occurs when photon interacts with an electron in the valance band and excites it to a higher energy level. 2.  Extrinsic Absorption : It is also called impurity absorptio...
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All You Need To Know About Is Optical Fibre Good Or Bad.

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Redusedcal fibre is an example of guided media or connection oriented media. It is suitable for long distance communication. Let's discuss about it. Optical fibre basic features : Transmission of signal is in optical form. It is made of glass or plastics. Efficiency high. Bandwidth very high. Diameter small. Noise immunity high. Highly expensive. Weight light Transmission speed is high. A pplication : 1. Medical : It is used as light guides, imaging tools and also as lasers for surgeries. 2. Telecommunication : Fiber is used for transmitting and receiving purpose. 3. Data storage : It is used for data transmission. Special properties of Optical fibre : 1. Optical fibre transmits a signal encoded beam of light by means of total internal reflection. Lets discuss what is Total Internal Reflection?? When the incident angle is greater than the critical angle, the light is reflected back to medium 1. There will not be any light transmission in medium 2. ...
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What You Know About Transmission Media And What You Don't Know About Transmission Media

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Transmission Media is defined as through which information is carried from source to destination. These transmission media can be connection oriented or connection less. There are two types of transmission media: Guided media(Connection oriented) Unguided media(Connection less) Guided Media: Guided media are those that provide a conductor from one device to the other. Signal requires a physical path for transmission. It is called wired communication. It provides direction to signal for travelling. Example : Twisted pair cable, Coaxial cable, Optical fibre Cable, Hub. Unguided Media: Unguided media are those transport electromagnetic waves without the use of physical conductor. They are wireless. Signal is broadcasted through air or sometimes water. It does not provide any direction. Example : Radio wave, Micro wave. F eatures of Connection oriented communication : Connection is necessary. It is used for connection establishment. It can be used u...
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