The expectation value of the force experienced by a particle in the right potential well (a) (F_n) positive.
In quantum mechanics, the expectation value of the force operator is given by the expression ⟨Fn⟩ = −⟨dx/dV⟩, where
V is the potential energy and
x is the position.
For a right potential well, the potential energy increases with position, resulting in a negative gradient. Therefore, the negative sign in the expression implies that the expectation value of force is positive.
Considering the nature of potential energy in a right potential well, the calculated expectation value of the force (F_n) is positive, indicating a tendency for the particle to experience a force in the positive direction.