Author Question: An electron with kinetic energy 2.80 eV encounters a potential barrier of height 4.70 eV. If the ... (Read 48 times)

brutforce · **on:** Jul 29, 2018

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 = 1.055 10-34 J s, h = 6.626 10-34 J s)
A) 3.5 10-3
B) 7.3 10-3
C) 1.4 10-2
D) 2.9 10-3
E) 3.5 10-2

Question 2

A particle confined in a rigid one-dimensional box (an infinite well) of length 17.0 fm has an energy level En = 2.0 MeV and an adjacent energy level En+1 = 37.5 MeV.

What is the value of the ground state energy? (1 eV = 1.60 10-19 J)
A) 1.50 MeV
B) 13.5 MeV
C) 0.500 MeV
D) 4.50 MeV