The previous page is sending you to https://chem.libretexts.org/Courses/Pacific_Union_College/Quantum_Chemistry/03%3A_The_Schrodinger_Equation_and_a_Particle_in_a_Box/3.05%3A_The_Energy_of_a_Particle_in_a_Box_is_Quantized.

 If you do not want to visit that page, you can return to the previous page.