When free electrons collide with Krypton atoms each of these atoms can be considered as an attractive potential with an abrupt boundary. Due to this fact, it is reasonable to approximate this potential to a quantum square potential well. Assume that an electron approaches the atom with 0.7eV kinetic energy and that the problem can be analyzed in 1D. If the radius of the potential is 0.4nm, determine the magnitude of the potential well in which the Ramsauer Effect will take place. [Ramsauer Effect proposes that the electron will cross the atom with no reflection probability]