An Electron with Kinetic Energy 2

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,m_el = 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