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What is the difference between spontaneous and stimulated emission of light?
stimulated emission causes due to the energy difference between the higher and lower energy level state, but it doesn't depends in the case of spontaneous emission . spontaneous emission causes without any stimulation .In stimulated emission energy transfer is twice the energy transfer of spontaneous emission.
What is the difference between spontaneous emission and stimulated emission?
stimulated emission causes due to the energy difference between the higher and lower energy level state, but it doesn't depends in the case of spontaneous emission . spontaneous emission causes without any stimulation .In stimulated emission energy transfer is twice the energy transfer of spontaneous emission.
How spontaneous emission occurs in case of lasers?
Spontaneous emission in lasers occurs when excited atoms or molecules in the lasing medium release energy in the form of photons. These photons have random phases and directions, which do not contribute to laser amplification. To achieve laser operation, the spontaneous emission needs to be amplified and synchronized through a process known as stimulated emission.
What is the difference between spontaneous emission of radiation and stimulated emission of radiation?
The laser causes the stimulated emission of radiation. The light emitted is monochromatic and coherent,that is plane polarised. I imagine that spontaneous emission occurs in a Light emitting diode ,monochromatic but not polarised. Hope this is of help
What is the Difference between spontaneous emission and stimulated emission any 5points?
Spontaneous emission occurs randomly and naturally when an excited atom transitions to a lower energy state, releasing a photon in the process. Stimulated emission, on the other hand, is induced by the presence of external photons that cause an already excited atom to release a second identical photon. In spontaneous emission, the emitted photon may have any frequency within the spectral line width of the transition. In stimulated emission, the emitted photon has the same frequency, phase, direction, and polarization as the stimulating photon. Spontaneous emission is non-coherent and occurs independently of external radiation. In contrast, stimulated emission is a coherent process that contributes to the amplification of light in lasers. The rate of spontaneous emission is independent of the intensity of external radiation, while the rate of stimulated emission is directly proportional to the intensity of the stimulating radiation. Spontaneous emission plays a role in processes like fluorescence and phosphorescence, whereas stimulated emission is the principle behind the operation of lasers.
Spontaneous emission of radiation from an atom?
This physical phenomenon is called radioactivity.
What is the significance of Einstein's A and B coefficients?
Einstein introduces A and B coefficients to describe spontaneous emission and induced absorption and emission.
What is the temperature at which the rates of stimulated and spontaneous emission are equal?
The temperature at which the rates of stimulated and spontaneous emission are equal is known as the "threshold temperature." This temperature is significant in laser physics, as it determines the conditions under which a material begins to exhibit lasing action. At this threshold, the gain from stimulated emission matches the losses from spontaneous emission and other factors, allowing for the amplification of light. The specific value of this temperature depends on the material properties and the system in question.
Difference between stimulated and spontaneous emission?
Stimulated emission occurs when an already excited atom is triggered by an external photon to release a second identical photon. Spontaneous emission, on the other hand, happens when an excited atom releases a photon without any external stimulation.
What is the spontaneous emission of energy in the form of particles or wave?
Spontaneous emission is the process where an unstable atom or molecule releases energy in the form of particles (such as photons) or waves without any external stimulation. This emission occurs when an excited atom or molecule transitions to a lower energy state, releasing the excess energy in the process.
What is spontaneous emission of radiation from an element?
This could have many names such as 'decay', 'radioactive decay', or 'radiation.
Why spontaneous emission is incoherent?
During spontaneous emission, photons are emitted randomly and hence they will not in phase with each other. such light is irregular and mixed of different frequencies,direction and duration.therefore the beam of light emitted is incoherent.sudhir tiwari.sharda university
