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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.
Cosmic background radiation; primal glow The background of radiation typically in the frequency range 3 x 10 11 to 3 x 10 8 Hz discovered in space in the year of 1965. It is
State and illustrate Lenz's law with examples Derive a mathematical expression for a force between two parallel conductors carrying a current.
A pith ball weighing 3.0 x 10 -2 N carries a charge of -1.0 x 10 -6 C. The pith ball is placed among two large, parallel, metal plates that are divided by 0.050 m. What is
What is a zone plate? How is it constructed? Show that a zone plate behaves like a convex lens. Deduce the expression for its focal length
a catapult can hurl a rock straight up in the air 45 m high. What is the maximun range of the catapult?
Ampere; A (after A.M. Ampere, 1775-1836) The basic SI unit of electric current, described as the current that, while going through two infinitely-long parallel conductors of ne
Nuclear Decays Uses a proper Monte Carlo engine to simulate real decays.The decay of 500 atoms of the fictional element Balonium.
GYROSCOPES: PRINCIPLES Gyroscopes are rotating masses (usually cylindrical in form) which are deliberately employed because of the particular properties which they demonst
Q. How can we increase the current sensitivity of a galvanometer? The current sensitivity of a galvanometer is able to be increased by (i) Rising the number of turns (ii
A car travels along a horizontal circular curved road that has a radius of 600 m. If the speed is uniformly increased at a rate of 2000 km>h2, determine the magnitude of the accele
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