- #1

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**1. What is U(x)psi**

_{n}(x) in the interval 0 < x < L? (less than or equal to)**2. In previous problems I had found the following:**

Second deriv. of psi(x) = -(n*pi/L)

U(x)*psi

Second deriv. of psi(x) = -(n*pi/L)

^{2}*C*sin(n*pi*x/L)U(x)*psi

_{n}(x) = 0**3. From the above and the Shrodinger equation, I added U(x) = 0 to the second derivative of psi given above multiplied by -h-bar/2m, obtaining the incorrect answer of:**

(h-bar*n*pi)

(h-bar*n*pi)

^{2}/2mL^{2}* C * sin(n*pi*x/L)