Calculate the highest frequency x-rays produced by 8.00 · 104 ev electrons. hz 7.50 x 1056 8.6 x 10-48 5.1 x 10-20 1.93 x 1019

When an electron stops, it emits a photon with energy equal to the kinetic energy lost by the electron:

The energy of the photon is where is the Planck constant and f is the frequency. Therefore, the maximum frequency of the emitted photon occurs when the loss of kinetic energy is maximum.

The maximum loss of kinetic energy of the electron occurs when the electron stops completely, so it loses all its energy:

Keeping in mind that , we have


And so, this corresponds to the energy of the emitted photon, E. Therefore, we can find the maximum frequency of the emitted photon:

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Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.