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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.
Their conductivity lies between conductor and insulator. Their resistivity is usually high and temperature coefficient of resistance is always negative. These are materials which a
concave grating and rowland''s mounting theory
SKIPPING IS A WHAT TYPE OF MOTION
uncontrollable reaction
Q. A person with a normal near point (25cm) using a compound microscope with objective of focal length 8.0mmandan eye piece of focal length 2.5cm can bring an object placed at 9.0m
5 example of Classification and 5 types of Vectors and 3 Dimensional Forces
The total energy of a simple harmonic oscillator is 0.8 erg. What is its kinetic energy when it is midway between an extreme position and mean position?
Q. Moment of Solid Sphere About Axis? The instant of enertia for a homogeneous solid sphere about an axis can be found by integrating spherical shells by integrating disks or b
The dimentional formula of frequency T -1
What are the characteristics of dead stars? Dead stars are generally cold balls of material in empty space. A teaspoonful of white dwarf matter would weigh as more as an Ele
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