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The rate at which stimulated emission occurs is proportional to the number of atoms N 2 in the excited state, and the radiation density of the light. The base probability of a photon causing stimulated emission in a single excited atom was shown by Albert Einstein to be exactly equal to the probability of a photon being absorbed by an atom in ...
Stimulated emission was a theoretical discovery by Albert Einstein within the framework of the old quantum theory, wherein the emission is described in terms of photons that are the quanta of the EM field. [5] [6] Stimulated emission can also occur in classical models, without reference to photons or quantum-mechanics.
Self-stimulatory behavior, also known as "stimming" [1] and self-stimulation, [2] is the repetition of physical movements, sounds, words, moving objects, or other behaviors. Stimming is a type of restricted and repetitive behavior (RRB). [ 3 ]
The first device using amplification by stimulated emission operated at microwave frequencies, and was called a maser, for "microwave amplification by stimulated emission of radiation". [10] When similar optical devices were developed they were first called optical masers , until "microwave" was replaced by "light" in the acronym, to become laser .
If a quartz movement is daily "rated" by measuring its timekeeping characteristics against a radio time signal or satellite time signal, to determine how much time the movement gained or lost between time signal receptions, and adjustments are made to the circuitry to "regulate" the timekeeping, then the corrected time will be accurate within ...
Hindlimb withdrawal time is another method. Sorin Barac et al. in a recent paper published in the Journal of Reconstructive Microsurgery monitored the response of test rats to pain stimuli by inducing an acute, external heat stimulus and measuring hindlimb withdrawal times (HLWT).
“It’s time-consuming and expensive,” she notes. “I wake up much earlier and don't get home until late, so that eliminates any opportunity for me to run errands, see friends, or go to the ...
The Ashoka Chakra has a spoke for each of 24 hours in a day.. Samaya (Sanskrit: समय, romanized: Samayā, lit. 'Time') [1] or Samayam (Sanskrit: समयम्, romanized: Samayaṃ) [2] is a Sanskrit term referring to the "appointed or proper time, [the] right moment for doing anything."