(Solved): Particle in 1D Box A neutron is confined in a one-dimensional box of length L=2.001011m with ...

Particle in 1D Box A neutron is confined in a one-dimensional box of length $L=2.00\times 10^{?11}\mathrm{m}$ with walls of infinite potential. (The rest mass of a neutron is $1.68\times 10^{?27}$ $\mathrm{kg}$.) The system is initially in its ground state configuration $n=1$. A photon then interacts with the neutron, causing it to jump to the excited state $n=$ 2. (i.e. The neutron absorbs all the photon's energy, so the difference between $n=1$ and $n=2$ came from the photon.) What is the energy of the system when in its excited state? Enter the numerical value in units of $\mathrm{eV}$.