Name_Student ID_
Tutorial: Quantum Tunneling
In this tutorial you will explore the physics of an electron traveling through an air gap in a wire first in
the case in which the electron has enough energy to get through the gap classically, and then in the
2
1
1. For this speed v , 1 v2 = 2 , so length contraction implies shrinkage by a factor of 2.
c
(a) Of course, A sees his ship at its proper length and shape. However, he sees the B ship to be
length contracted (only in the direction of motion!). So the
Today
1. group invention activity (~20 min?)
2. interactive lecture
Reminders
Problem Solving Session: Monday at 4.30pm in Hebb 13
Final Exam: 1 week after last class
(if last day Monday, then on 1st Friday)
Register clickers! www.icklicker.com
Phys153 ex
Q1: Correct answer is B.
The initial energy is 4mc2 and the initial momentum is zero. Of the 4 nal states, A) has a total
energy 2(2mc2 + K ) > 4mc2 , where K is kinetic energy of each particle. This is not possible; B)
is possible, since it conserves mom
Today
1. group invention activity (~20 min?)
2. interactive lecture
3. another group activity (may not finish)
Bell means stop talking-Lots of chance to talk, but when bell goes off, 10 sec
to finish up and get in clicker answers.
Then stop talking unless
Rotate seating position each class.
Alternate between center two seats and end seats.
Mix-up who is sitting next to whom.
How many did brief review of last lecture?
a. I reviewed by first testing myself on what I remembered.
b. I did review, but just look
Midterm1 is Friday June 10, at 10.30am (in class)
Problem solving session Mon at 4:30pm, Hebb 13
Assignment solutions are on P&A-Phys250 website
Today:
1- Probability and randomness in quantum mechanics
2- Rutherford Model of the atom
1
Quiz on Potential
Rotate seating position each class.
Alternate between center two seats and end seats.
Mix-up who is sitting next to whom.
How many did brief review of last lecture?
a. I reviewed by first testing myself on what I remembered.
b. I did review, but just look
pick up midterm, end of class. How many student questions?
Davisson Germer learning goal (take too much time, optional)
Sketch out the design for an experiment to use an electron beam to measure the
spacing between atoms in a clean crystal. Say what the d
Exam during tutorial time on Friday June 10. Bring calculators.
75% of score individual. Can use one sheet of paper with
anything written on it that you want.
(physical constants needed given on exam)
25% of score- turn in individual exam then do in group
FINAL on Friday July 22 at 10.30 am
General review on Monday July 18
1. Today- return to models of hydrogen atom
Schrodinger model.
2. extension to other atoms & molecules
3. Concept mapping exercise.
1
Models of atom
1.Observe atomic spectra, try to deve
Name_Student ID_
Tutorial: Quantum Tunneling
In this tutorial you will explore the physics of an electron traveling through an air gap in a wire first in
the case in which the electron has enough energy to get through the gap classically, and then in the