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Illustrate the A and B coefficients of Einstein in shortly.
Einstein’s A and B coefficients:
Einstein suggested a mathematical expression for the existence of stimulated emission of light that is termed as Einstein’s expression.
Into atomic system, each three transition processes as stimulated absorption, spontaneous emission and stimulated emission happen simultaneously. While photons interact along with atoms, both upward i.e., absorption and downward i.e., emission transitions happen. At equilibrium such transition rates should be equal.
A virtual image can be formed by one or more of the following single mirrors? Identify them. a) Plane mirror b) Concave spherical mirror c) Convex spherical mirror
Is negative mass antimatter? No. There is really no such thing as negative mass. Even antimatter has mass, which is always a positive (that is, greater-than-zero) quantity.
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Write a mathematical expression for deviation produced by a thin prism and illustrate the terms.
What are intrinsic and extrinsic semiconductors? A semiconductor is a material that has an electrical conductivity among that of a conductor and an insulator. In a semiconducto
can you give me a example of calcuate of laws2
Who are the best system integrators? Being fairly the opposite of fiber optics manufacturers, system producers are generally small companies. In this case size has the opposite
It is known that the pressure developed by a centrifugal pump, Δp, is a function of the diameter D of the impeller, the speed of rotation n, the discharge Q, and the fluid density
On a summer day the air temperature is 27° C and the relative humidity is 30%. Water evaporates from the surface of a lake at a rate of 0.10 kg/h per square meter of water surface
The airplane shown in the figure is to achieve "weightlessness" for a short period of time by flying along a curved path such that it's acceleration components in x direction a x
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