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Why does the excitation of molecules not take place during the stimulted emission process?
Excitation may not take place in a laser (or the like) for a number of reasons. The lasing medium may be defective or contaminated and unable to lase. The stimulation may be insufficient or incorrect. There are other technical reasons that prevent stimulation emission from taking place, but they generally have to do with the lasing medium or the action of the stimulator. Our friends at Wikipedia have a some relevant articles up, and links are provided. Knowledge there is free.
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What is the peak at 800nm in fluorescence spectroscopy?
It depends what you used as your excitation wavelength. If you used 800 nm as your excitation wavelength, this is due to Rayleigh scattering, where photons from the emission source are scattered off of the molecules in your sample and are picked up by the detector. If your wavelength is shorter (like 400 nm) then this is due to Raman Scattering, where the molecule either absorbs or donates energy from/to the photon during the scattering process. Scattering peaks are traditionally much sharper than fluorescence peaks.
What is it called when electrons jump to higher energy level?
This process is called excitation, where electrons absorb energy and move to higher energy levels within an atom.
What is the decay process of lead 210?
An alpha and a beta emission
In which process dose the cell use a vesicle to move molecules out of the cell?
Exocytosis is the process that moves molecules from the inside of the cell to the outside. This process uses sacs or vesicles to move the molecules out.
What is the process in which electricity converts oxygen into ozone?
When electricity passes through oxygen gas (O2) in a process called electric discharge, some of the oxygen molecules dissociate into oxygen atoms (O). These oxygen atoms then combine with other oxygen molecules to form ozone (O3). This reaction occurs in the stratosphere, producing the ozone layer that shields the Earth from harmful UV radiation.
What is the relationship between excitation and emission in fluorescence spectroscopy?
In fluorescence spectroscopy, excitation is the process of stimulating a molecule to absorb light energy, causing it to move to a higher energy state. Emission is the subsequent release of this absorbed energy in the form of light. The relationship between excitation and emission is that excitation triggers emission, with the emitted light having a longer wavelength than the absorbed light. This phenomenon is used in fluorescence spectroscopy to analyze the properties of molecules and materials.
How do photons work in the process of light absorption and emission?
Photons are particles of light that carry energy. When light is absorbed by a material, photons transfer their energy to the material's atoms, causing them to become excited. This excitation can lead to the emission of light when the atoms return to their original state, releasing photons in the process.
What is the peak at 800nm in fluorescence spectroscopy?
It depends what you used as your excitation wavelength. If you used 800 nm as your excitation wavelength, this is due to Rayleigh scattering, where photons from the emission source are scattered off of the molecules in your sample and are picked up by the detector. If your wavelength is shorter (like 400 nm) then this is due to Raman Scattering, where the molecule either absorbs or donates energy from/to the photon during the scattering process. Scattering peaks are traditionally much sharper than fluorescence peaks.
How is light generated and what are the processes involved in its production?
Light is generated through the emission of electromagnetic radiation by atoms or molecules. This process involves the excitation of electrons to higher energy levels, followed by their return to lower energy levels, releasing photons in the form of light. This can occur through various processes such as incandescence, fluorescence, phosphorescence, and bioluminescence.
What is the difference between raman effect and flueroscence?
The Raman effect is the inelastic scattering of light by molecules, resulting in a shift in wavelength. Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. Both phenomena involve interactions between light and molecules but differ in the mechanism of light 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 it called when electrons jump to higher energy level?
This process is called excitation, where electrons absorb energy and move to higher energy levels within an atom.
What is an electron emission?
The process in which an electron emit from metal surface into surrounding is known as electrons emission
What is phosphorescence?
Phosphorescence is a type of light emission that continues for some time after the excitation source is removed. It occurs when certain materials absorb energy and then release it slowly as light. This phenomenon is often seen in glow-in-the-dark items.
What is the decay process of lead 210?
An alpha and a beta emission
The emission of a positron also results in the creation of?
If you are talking about beta+ decay, then the emission of a positron is accompanied with the emission of an electron neutrino.
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.
