Chapter 1: Q16P (page 22)
Show that
For any two solution to the Schrodinger equation and .
Short Answer
The solutions for and is
/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none}
Learning Materials
Features
Discover
Chapter 1: Q16P (page 22)
Show that
For any two solution to the Schrodinger equation and .
The solutions for and is
All the tools & learning materials you need for study success - in one app.
Get started for free
Consider the first 25 digits in the decimal expansion of 蟺 (3, 1, 4, 1, 5, 9, . . .).
(a) If you selected one number at random, from this set, what are the probabilities of getting each of the 10 digits?
(b) What is the most probable digit? What is the median digit? What is the average value?
(c) Find the standard deviation for this distribution.
At time t = 0 a particle is represented by the wave function
where A, a, and b are (positive) constants.
(a) Normalize (that is, find A, in terms of a and b).
(b) Sketch , as a function of x.
(c) Where is the particle most likely to be found, at t = 0?.
(d) What is the probability of finding the particle to the left of a? Check your result in the limiting cases b = a and b= 2a.
(e) What is the expectation value of x?
Suppose you add a constant to the potential energy (by 鈥渃onstant鈥 I mean independent ofxas well as t). In classical mechanics this doesn鈥檛 change anything, but what about quantum mechanics? Show that the wave function picks up a time-dependent phase factor:. What effect does this have on the expectation value of a dynamical variable?
Consider the wave function
whereA, 位, and 蝇 are positive real constants. (We鈥檒l see in Chapter for what potential (V) this wave function satisfies the Schr枚dingerequation.)
(a) Normalize .
(b) Determine the expectation values of and .
(c) Find the standard deviation of . Sketch the graph of , as a function ofx, and mark the points and , to illustrate the sense in which蟽 represents the 鈥渟pread鈥 inx. What is the probability that the particle would be found outside this range?
For the distribution of ages in the example in Section 1.3.1:
(a) Compute and .
(b) Determine 鈭j for each j, and use Equation 1.11 to compute the standard deviation.
(c) Use your results in (a) and (b) to check Equation 1.12.
What do you think about this solution?
We value your feedback to improve our textbook solutions.