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electron and photon

1.) In a television picture tube the electrons are accelerated from rest through a potential difference V. Just before an electron strikes the screen, its de Broglie wavelength is 0.8*10^-11 m. What is the potential difference?

2.) A photon has the same momentum as an electron moving with a speed of 1.6 *10^5 m/s. What is the wavelength of the photon.

Solution Summary

Wavelengths of the electron and photon are investigated.