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In electron beam melting technology, the speed of electron is almost equal to the speed of light.

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in Casting-Forming-Welding II by (119k points)
In electron beam melting technology, the speed of electron is almost equal to the speed of light.

(a) True

(b) False

This question was addressed to me in an interview for internship.

The origin of the question is Laser and Electron Beam Melting With Rapid Prototyping topic in section Casting Process of Casting-Forming-Welding II

1 Answer

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Right option is (b) False

The explanation is: In electron beam melting technology, the electrons are emitted from a filament which is generally heated to very high temperature. Then the electrons are accelerated to half the speed of light in the electric field. The beam of electrons is mainly controlled by two magnetic fields in the vacuum chamber. No object can achieve the speed equal to the speed of light in the universe.

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