Practice Problems
Atomic Energy Levels and Double Slit Interference
Topics:
On this worksheet you will examine excitation, de-excitation, and a review of the properties of double slit interference.
Page Directions
The numerical values in this worksheet are randomly generated allowing students the opportunity to conveniently practice, and drill, common situations.
Before beginning any given worksheet, please look over all of the questions and make sure that there are
no duplicate
answers shown for the same question. If duplicates are present simply refresh the page until every answer is unique.
In order to check an answer
(even when you are just starting the worksheet on Question 1)
it is necessary to
any questions that you have not answered. Once you start submitting answers, the page may be checked as many times as necesasary without changing the randomized answers. Relevant scoring will be provided at the top of the page only when you answer all of the questions on your original submission.
Question 1
How much energy (in eV) would a ground state electron, E = -19 eV, acquire when it absorbs a 406 nm photon?
3.27 x 10
0
eV
3.06 x 10
0
eV
1.18 x 10
0
eV
7.84 x 10
0
eV
Question 2
As a consequence of absorbing this 406 nm photon, what would be the energy associated with the electron's new exctied state?
-2.21 x 10
1
eV
-1.78 x 10
1
eV
-1.59 x 10
1
eV
-1.57 x 10
1
eV
Question 3
The excited atom subsequently emits visible light at both 406 nm and 605 nm. What additional energy level should be added to your energy level diagram to accommodate this data?
-1.82 x 10
1
eV
2.05 x 10
0
eV
-1.01 x 10
0
eV
-1.37 x 10
1
eV
-1.69 x 10
1
eV
Question 4
At which other wavelength outside the visible range do these atoms emit radiation after they are excited by the 406 nm light?
3.46 x 10
3
nm
6.92 x 10
3
nm
1.23 x 10
3
nm
3.78 x 10
3
nm
Question 5
Two parallel slits 4.74 x 10
-6
m apart are illuminated by plane waves of monochromatic light, and it is found that the 5th bright fringe is at an angle of 2.35º. Determine the wavelength of the light.
3.89 x 10
-8
5.57 x 10
-5
4.34 x 10
-4
4.32 x 10
-8
none of the above
Question 6
Which order correctly represents the transformation in a double slit interference pattern as the distance between the slits is increased?
A, B, C, D
C, B, D, A
A, D, C, B
B, C, D, A
A, D, B, C
PhysicsLAB
Copyright © 1997-2025
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton
