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Q. What are the conditions to achieve the laser action?
Conditions to achieve laser action
(i) There should be an inverted population that is more atoms in the excited state than in the ground state.
(ii) The excited state should be a metastable state.
(iii) The emitted photons should stimulate further emission. This is achieved by the utilize of the reflecting mirrors at the ends of the system.
Hubble constant; H0 (E.P. Hubble; 1925): The constant that determines the relationship among the distance to a galaxy and its velocity of recession because of the expansion of
Bohr magneton (N. Bohr) It is the quantum of magnetic moment. Bohr radius (N. Bohr) It is the distance corresponding to the mean distance of an electron through the nuc
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#how does multihance work in mra and how does it improve mri image quality?question..
A circular hole of radius r at the bottom of an initially full water container is sealed by a ball of mass m and radius R (>r). The depth of the water is now slowly decr
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Would a nail rust in oil and water or water and oxygen?
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