An Electron with Kinetic Energy 5

Multiple Choice

An electron with kinetic energy 5.0 eV traveling in a region in which the potential energy is zero is incident at x > 0 on a potential barrier of height 3.0 eV.What is the wavelength of the electron in the region x > 0?

A) 0.87 nm
B) 0.99 nm
C) 0.54 nm
D) 2.3 nm
E) 0.14 nm