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GALLIUM PHOSPIDE: It has band gap of 2.3ev. it can be used for light emitting diodes which can emit green or red light. The red light is obtained with zinc or cadmium oxide doping.
SELENIUM: It is found in crystalline and non-crystalline form. It is used as rectifier material for photo voltaic cells and for xerographic printing. Selenium films are used as photo electric light meters. Its melting point is 2200C.
LEAD: it is soft heavy and bluish gray metal. It is highly resistant to many chemical actions but can corrode by nitric acid, lime and rotten organic substances. Lead and its compounds are toxic. It is mechanically weak it cannot withstand vibrations at high temperatures. It alloys easily with Tin and zinc and forms many commercial alloys, including solders and bearing metals.
A blackhole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mas
How a CPH products? Answer; no time has passing of a CPH. Thus, CPH exists and never decay.
Q. Define: current density. Give its unit. The amount of charge passing per unit time through unit area taken perpendicular to the direction of flow of charge at that point is
working and construction of interferometer
Equatorial Line and Neutral point: Equatorial Line: The imaginary line joining the centre of mass and perpendicular to the line joining the poles of a bar magnet is called th
What are the Semiconductor Devices? A semiconductor is a material whose conductivity is much less than a conductor (such as copper), but greater than that of an insulator (such
Write down the Maxwell's electromagnetic equation in differential form in a medium, in the presence of currents and charges. Identify and state the laws of electromagnetism with wh
The boom DF and the column DE have a uniform weight of P55 N/m and the chain and load at F is P56 kN. Determine the Shear Force in kN rounded to 1 DP and the Bending Moment in kN.
project report
Surface crystallography and epitaxy. Fe thin films are grown on a single-crystal Al(100) substrate surface. The films grow with no dislocations (if they are thin enough) with sug
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