0
Thermionic emission is the process by which electrons are emitted from a heated metal or semiconductor surface. When the material is heated to a sufficiently high temperature, some of the electrons gain enough energy to overcome the work function of the material and escape into the surrounding space. This phenomenon is used in vacuum tubes and electron guns.
What else can I help you with?
When was Emission Impossible created?
Emission Impossible was created on 2001-11-08.
What kind of metals can be quantified by atomic emission spectrometry?
Atomic emission spectrometry is limited to alkali metals.
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.
How do you control the emission that have succeeded in reducing the damage to the ozone layer?
We can control the emission by banning completely. These would be CFC's.
What statement of emission spectra is correct?
Emission spectra consist of discrete, colored lines at specific wavelengths, corresponding to the emission of photons as electrons transition from higher to lower energy levels. Each element has a unique emission spectrum due to its specific electron configuration and energy levels. Emission spectra are useful for identifying elements present in a sample and are commonly used in analytical chemistry and astronomy.
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 are 4 methods of electron emission?
1- Secondary Emission 2- Thermionic Emission 3- Field Emission 4- Photo-Electric Emission Badbanky
What is the noun of emission?
The word emission is a noun, a common singular noun.
What part of speech is emission?
Emission is a noun.
What is the adjective of emission?
The adjective form of emission is "emissive."
Does atomic emission come from the sun?
there is no atomic emission from the sun.
When was Edelweiss Emission created?
Edelweiss Emission was created in 1989.
Is emission an adjective?
No, emission is a noun; a common, singular, concrete noun. Emission sometimes appears in the adjective position, for example 'an emission standard' or 'an emission control." Some authorities treat such cases as double nouns; others, as noun modifiers. Since noun modifiers are nouns given an adjectival use, some people regard "emission" as an adjective in such constructions, though unlike most attributive adjectives, they cannot be graded(*"a very emission standard") or given a predicative use (*"the standard, which was emission" or *"The emission was standard").
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.
Is emission a verb?
No, the word 'emission' is a noun form of the verb to emit.
Advantages and disadvantages of atomic emission spectrometry?
advantages of atomic emission
When was Emission Phase created?
Emission Phase was created in 2007-01.
