Griffiths Problem 4.16 is a physics problem presented in the textbook "Introduction to Quantum Mechanics" by David J. Griffiths. It involves finding the wave function and energy eigenvalues for a particle in a one-dimensional infinite square well potential.
Figure 4.18 is a graph that shows the potential energy function for the particle in the infinite square well, as well as the allowed energy levels and corresponding wave functions.
This is a common question among students studying Griffiths Problem 4.16. The answer is no, Figure 4.18 is not a mistake. It accurately represents the potential energy function and allowed energy levels for the particle in the infinite square well.
Some students may question the accuracy of Figure 4.18 because it shows the potential energy function as a step function, while in reality it is a continuous function. This is simply a simplification made for the sake of illustration, and does not affect the overall accuracy of the problem.
Figure 4.18 is used to demonstrate the quantization of energy in a particle in a one-dimensional infinite square well potential. It shows the discrete energy levels that the particle can occupy, and the corresponding wave functions. This is an important concept in quantum mechanics.