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1. Electrons will readily tunnel out of the surface of a metal when a sufficiently high...

1. Electrons will readily tunnel out of the surface of a metal when a sufficiently high electric field E is applied to the surface. Suppose that for a certain metal the fermi energy is 5.0 eV, and work function is 4.0 eV. Estimate the probability that an incident electron will tunnel out if E = 1 x 109 V/m .

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