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sudhir tiwari.
sharda university
Spontaneous emission is incoherent because the emitted photons have random phases and do not possess a fixed relationship with each other in terms of direction or wavelength. This randomness results in a lack of correlation between the emitted photons, making them incoherent.
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Why the spontaneous radiation incoherent?
Spontaneous radiation is incoherent because it occurs randomly with no fixed phase relationship between emitted photons. This randomness results in a broad range of frequencies and directions for the emitted radiation, making it incoherent.
What is the difference between spontaneous and stimulated emission of light?
In spontaneous emission, photons are emitted randomly and independently of other photons. In stimulated emission, photons are emitted in response to an incoming photon, which triggers the emission of additional photons that have the same frequency, phase, and direction. Stimulated emission is the process that underlies the operation of lasers.
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.
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.
Why the spontaneous radiation incoherent?
Spontaneous radiation is incoherent because it occurs randomly with no fixed phase relationship between emitted photons. This randomness results in a broad range of frequencies and directions for the emitted radiation, making it incoherent.
How can spontaneous emission be control?
That's why it's called spontaneous emission you cannot control it. But there is a kind of emission which is called stimulated emission emission. People use stimulated emission in lasers and it can be controlled.
What is the difference between spontaneous and stimulated emission of light?
In spontaneous emission, photons are emitted randomly and independently of other photons. In stimulated emission, photons are emitted in response to an incoming photon, which triggers the emission of additional photons that have the same frequency, phase, and direction. Stimulated emission is the process that underlies the operation of lasers.
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.
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.
