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WHAT IS NANOTECHNOLOGY ?

N anotechnology is the science of manipulation of matter according to our need at the Nanoscale of the order of 10^-2 . it have tremendous possibilities in near future because of its ability of making advance material  with unique chemical property which suits according to condition   .  This term technically first time introduced by physicist Richard Feynman in 1959 in his lecture with topic of There is plenty of room at the bottom . but at that time technology was not enough to implementation of his idea in practical application's . Primarily there is two type of approaches we use to construct anything  - I)  Top-to-bottom approach  II) Bottom-to-top approach Top-to-bottom approach :- when we cutoff resource to make our desirable shape is known as Top-to-bottom approach ; Ex- wooden chair .  Bottom-to-top approach :- when we construct structure by starting from its minute cells to approaching required shape of structure is known...
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CAN WE PRODUCE CLEAN ENERGY ?

World is full of advancement today from previous era , we have astounding facilities good lifestyle better food and more but did you ever feel amazed how all of this possible today which was impossible before , all of this happens because of our developed technology of converting energy from one form to another with increased efficiency . but we are again at the bank of river of question's  , question which is seducing me from past several months and its attempt to draw my attention is legal too because of our current condition  a problem of ENVIRONMENTAL POLLUTION who is grown up baby now of our human race and its age is from industrial revolution to today's date . if i play little maneuver to our problem of environmental pollution to a QUESTION as              " is there any way to get immense treasure of clean energy ? " like we usually do in mathematics , and if yes than how , here the clean energy source ...
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WHAT IS LIGHT EMMITING DIODE ?

LED is a very commonly used device nowadays we use it in various application because of its small size and,cheap prize its very popular among peoples . we use it even in special television set for screen as LED pixels which is useful for clarity for distance audience . basically it is a diode which is set to be in forward condition .   Full form of LED is LIGHT EMITTING DIODE . As evident from name it is diode who produce photon when voltage is given to it . this type of diode is not made by generally used semiconductor's like silicon and germanium it manufactured by arsenic phosphorus and gallium . various types of color can can be produced by changing quantities of material it made up of .  WORKING - Basically it is like a normal diode just difference with it produces light when a forward voltage applied to it . as we know  electron needs energy to jump from lower orbit to higher orbit ,  the working of LED is typically reverse of this process electr...
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