I am studying on the actual nature of light. The electron emission is related with the nature of light. If any experience researcher (Full Professor) wish to guide me on this (actual nature of light) field I will be highly grateful.
Electrons emitted from target in CRT are focussed by electrostatic lenses in the form of fine beam of electrons which is passed through mutually perpendicular sets of plates to deflect them along x and y direction on the fluorescent screen. This has no relation with nature of light.Here we consider electron as particle which are deflected by electric field applied across x or y plates.
Dear Sir,
Thank you very much for your answer.
The electron emits perpendicularly from the metallic target without biased of any fields. It is a property of the cathode ray.
There are four (now three) kind of fundamental forces. Electrons movement related "energy" and the "energy" of the light are under Electromagnetic force.
I think the scientists have been discovered (invented) almost zero percent of unknown science up-to present.
Dr. Muhibbullah,
The nature of light attracted the attention of the scientists long time ago. You find in the books of physics complete parts on the nature of light. Light is the seen part of the electromagnetic spectrum. Basically there are three theories for the nature of light; the fine particle nature by Newton, the wave nature by Hygen and the photon nature of the light by Einstein. It is so that the light is composed of wave packets with certain energy which make them confined in the space and therefore have particle behavior. These wave packet called photons. Every photon contains an energy Ep= h C/ lambda, where h the planck constant and the, C is the speed of light in the free space and Lambda the wavelength of the photons electromagnetic wave.
It is now fixed that the light behaves as a wave during transmission while it behaves as mass when interacting with the microscopic particles like the electrons. Which means that the light is absorbed or emitted by the material in form of photons.
So, during the transmission we apply the laws of the electromagnetic on it including Maxwell equations. In case of adsorption and emission we treat it as photons.
So, in interacting with electrons the light behave as photons and one applies the laws of energy and momentum conservation.
Electron electron interactions are subjected also to the conservation of momentum and energy. So a perpendicular impinging electron has only vertical momentum, may knock out electrons in the vertical direction assuming the knocked electrons has only vertical momentum or has apparently no momentum . It can so that the incident electron is reflected back by atoms and the the rebound electron knocks out vertically native electrons out of the material. The last scenario may be the more probable.
This may be very simplified picture but i think it is useful to start with. It is a mechanical problem. There are simulators for solving such problems .
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