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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.
what was the results of the war of 1812
Natural and forced vibrations When we strike a tuning fork with a rubber hammer it vibrates with certain frequency. The frequency does not change even if we hit it harder.
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