An electron moving with velocity v = 179 km/s is incident on a place where the e

Question

An electron moving with velocity v = 179 km/s is incident on a place where the electric potential suddenly increases by 1.60 V. Recall that the electron has negative charge, so this represents a decrease in potential energy.

(a) Calculate the kinetic energy of the incoming electron.

eV

(b) Calculate the probability for reflection, as a percent.

%

A particle with kinetic energy 33.00 eV impacts on a potential step of unknown height. It is found that 47.0% of them manage to penetrate the barrier. What is the height of the potential step? There should be two solutions

eV (more negative one)
eV (more positive one)

Explanation / Answer

An electron moving with velocity v = 179 km/s is incident on a place where the e

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