a. What is the probability that an electron will tunnel

Chapter 40, Problem 40.80

(choose chapter or problem)

a. What is the probability that an electron will tunnel through a 0.50 nm air gap from a metal to a STM probe if the work function is 4.0 eV? b. The probe passes over an atom that is 0.050 nm tall. By what factor does the tunneling current increase? c. If a 10% current change is reliably detectable, what is the smallest height change the STM can detect?

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