An Electron with Kinetic Energy 2

question 22

Multiple Choice

An electron with kinetic energy 2.80 eV encounters a potential barrier of height 4.70 eV. If the barrier width is 0.40 nm, what is the probability that the electron will tunnel through the barrier? (1 eV = 1.60 × 10^-19 J, mel = 9.11 × 10^-31 kg, h = 6.626 × 10^-34 J ∙ s)

• A) 1.4 × 10^-2
• B) 2.8 × 10^-2
• C) 5.5 × 10^-2
• D) 1.1 × 10^-2
• E) 1.4 × 10^-1

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