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Can photoelectric effect be observed using infrared rays?
No, the photoelectric effect is the emission of electrons from a material due to the absorption of photons. Infrared rays have lower energy photons than visible light, so they are not typically energetic enough to cause the photoelectric effect. Only photons with enough energy, such as ultraviolet or higher energy photons, can induce the photoelectric effect.
Thermionic Emission of electron is due to?
Thermionic emission of electrons is due to the heating of a metal, which causes electrons to gain enough thermal energy to overcome the work function of the metal and escape into free space. This process results in the emission of electrons from the metal surface.
What is thermonic emission?
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.
How do you know if two twins are identical or just fraternal twins that look a lot alike?
(Person that asked the question)-Once twins are born, and old enough to determine whether they are identical or fraternal, how do you know if they are identical, or just fraternal twins that look identical? I was just curious.
Liquid to gas hot or cold?
When a liquid turns into a gas, it absorbs heat from its surroundings, making the surroundings feel cold. This absorption of heat allows the particles in the liquid to gain enough energy to escape into the gas phase.
How do your muscles continue to get energy during high levels of activity when there is not enough energy?
The muscles continue to get enough energy during high levels of activity when there is not enough oxygen through the absorption of water. It is a good idea to drink water frequently when doing strenuous exercise.
Can photoelectric effect be observed using infrared rays?
No, the photoelectric effect is the emission of electrons from a material due to the absorption of photons. Infrared rays have lower energy photons than visible light, so they are not typically energetic enough to cause the photoelectric effect. Only photons with enough energy, such as ultraviolet or higher energy photons, can induce the photoelectric effect.
Thermionic Emission of electron is due to?
Thermionic emission of electrons is due to the heating of a metal, which causes electrons to gain enough thermal energy to overcome the work function of the metal and escape into free space. This process results in the emission of electrons from the metal surface.
What Emission of high energy radiation or particles from the nucleus of a radiation atom?
Nuclear radiation is the emission of high-energy particles or electromagnetic waves from the nucleus of an atom. It can take the form of alpha particles, beta particles, gamma rays, or neutron radiation, and it can be ionizing, meaning it has enough energy to remove tightly bound electrons from atoms.
Can the brain manage energy?
Yes, the brain is responsible for regulating energy balance within the body through various processes including hunger signals, metabolism, and nutrient absorption. This regulation ensures that the body has enough energy to function optimally.
What is photoelectric emission effect?
The photoelectric emission effect is a phenomenon where electrons are emitted from a material when it is exposed to light, typically of high enough frequency (i.e., energy) to cause electrons to be ejected from the material's surface. This effect is important in technologies like solar cells and photomultiplier tubes.
Absorption happens when nutrients are small enough to pass into your?
Intestine
How is an emission spectrum of an element generated?
All hot solids or dense enough gases emit black body radiation. Gases that are not very dense are are cold absorb particular wavelengths while gases that are not dense but are hot produce their characteristic emission spectrum.
What is thermonic emission?
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.
Which nuclear decay emission only consists of energy?
Gamma decay is primarily "energy only", in that it is the emanation of photons that represent energy. However, and this is important to understand, gamma does not exist by itself - gamma is a secondary reaction to a primary reaction that involves a change to the nucleus - a change that is usually represented by alpha or beta decay.So, with the exception of the few metastable forms of radionuclides, gamma still, ultimately, is preceded by particle emission. (Even in the metastable forms, the gamma is preceded by particle emission - its just that the event is delayed enough to "count it" as a separate event.)
What are the Differences between thermionic emission and photoelectric emission?
Electrons would have enough energy to leave the metal surface, the hot cathode. However, without the forward voltage bias, positive anode. The vacuum diode could not conduct electricity. In other words, the initial kinetic energy of the emitted electrons can be ignored [0 J].Whereas, the photo-emitted electrons possess definite amount of initial kinetic energy.K.E. of e = hf - WorkFunctionSee, the initial k.e. is not neglectable.
Why does sodium vapor emit only certain frequencies of visible light?
It is because the electrons surrounding an atom, say sodium, can only exist at certain energy levels. When a photon (packet of light energy) hits an orbiting electron it only gives energy to that electron if the energy of the photon is exactly enough to move the electron to a higher energy level, if not it doesn't effect the electron. As the energy of a photon is directly proportional to the it wavelength, only certain wavelengths affect an atom's electrons. When they do effect the electrons the photon is absorbed, giving the absorption spectrum. Emission spectra are the reverse of this process, when an electron cascades back down to its lowest possible energy state after this photon interaction it gives out certain frequencies of light. The energy of this light will be equal to the energy absorbed, so the photons emitted will be equal to the photons absorbed which is why emission spectra look like the inverse of an absorption spectrum.
