the external energy given to electrons,thier kinetic energy increases.thus electrons move from metal surface
photoelectric effect
Different metals have different work functions, which determine the amount of energy required to remove an electron from the surface of the metal. Metals with lower work functions typically exhibit higher electron emission because it requires less energy to release an electron. Additionally, the surface properties of the metal can affect electron emission, such as roughness or cleanliness, which can impact the efficiency of the emission process.
No. It is not possible for two metals to have the same emission spectrum. For metals to have the same emission spectrum, they would need for their electrons to have duplicate orbitals. That would be impossible due to the exclusion principle.
The process in which an electron emit from metal surface into surrounding is known as electrons emission
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.
* emisssion of electron from the surface of the metal when light of suitable frequency falls-photoelectric emission. * emision of electron from the metal by quantum tunnling of electron.
One method is thermionic emission, where electrons are released from a heated metal surface. Another method is field emission, where a strong electric field is used to pull electrons from the surface of a material. Additionally, heating a material to high temperatures can cause electron excitations that lead to electron emission.
The equation for the work function of metals is given by the formula: Work Function Planck's constant x Frequency of incident light. The work function represents the minimum amount of energy needed to remove an electron from the surface of a metal. When light with a frequency higher than the work function strikes the metal surface, it can transfer enough energy to the electrons, causing them to be emitted from the metal surface.
There are free electrons on the surface of a metal and their movement on surface is the conductance of electricity.
The looseness of electrons in metal atoms.
Threshold wavelength refers to the minimum wavelength of light required to start a specific phenomenon, such as photoelectric effect or emission of electrons from a metal surface. Below this threshold wavelength, the desired effect does not occur.
Atomic emission spectrometry is limited to alkali metals.