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It is suitable for growing semi-conductively alloys like gallium arsenide. A typical arrangement is furnished with an induction heater that provides a controllable temperature gradient along the furnace. The boar with the material is placed in sealed tube and moved from high temperature zone to low temperature zone. The chemical purified gallium arsenide material is melted at about 1250 degree centigrade in high temperature zone and slowly passes into lower temperature zone where it solidified from one end to about 620 degree centigrade. The temperature is chosen so that a small amount of arsenide always kept in this zone will provide an arsenic atmosphere in which crystallisation of gallium arsenide occurs.
Determine the potential and field due to a short dipole of dipole moment 5.0 X 10 -16 coulomb-cm at a point distant 1 cm from it. (a) on its axis (b) on its perpendicular bi
When a metal becomes a superconductor, there is a tremendous decrease in it's: a) Total volume b) Electrical resistance c) Length d) Density Ans: While a
#question.5.
Wien displacement law: For blackbody, the product of the wavelength equivalent to the maximum radiancy and the thermodynamic temperature is a constant, the Wien displacement l
The recombination procedure is represented with returning the electron from the CB where it is free into a hole in the VB where it is in a bond. The excess energy of the electron
Ripple tank The concept of reflection and refraction of light waves can be understood by the study of reflection and refraction of waves on water. The water waves travel
Interference of waves: When two waves of similar amplitude and period traveling in the similar medium superpose, they reinforce each other at one point and cancel at others. Th
Q What is photoelectric effect? Photoelectric release is the phenomena by which a good number of substances chiefly metals emit electrons under the influence of radiation such
Describe the resolution of the scanning electron microscope. Resolution of the SEM (scanning electron microscope): The spatial resolution of the SEM depends onto the size of
true or false. All radioactive elements have been synthesized
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