A Particle of Kinetic Energy E₀ Traveling in a Region

Multiple Choice

A particle of kinetic energy E₀ traveling in a region in which the potential energy is zero is then incident on a potential barrier of height U₀.What is the ratio of E₀/U₀ so that the reflection co-efficient is 25%? (Assume E₀ is much less than the rest mass energy of the particle.)

A) 4.0
B) 1.25
C) 1.125
D) 1.025
E) 0.75