This preview shows pages 1–2. Sign up to view the full content.
Exam Version A
h = 6.63 x 10
34
J sec
c = 3 x 10
8
m/sec
MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
1) The work function of a particular substance is 2.54 x 10
19
J. What is the photoelectric cutoff wavelength
for this material?
A) 916 nm
B) 783 nm
C) 509 nm
D) 650 nm
2) What is the velocity of an electron (mass = 9.1 x 10
31
kg) with a de Broglie wavelength of 4.03
m
m?
A) 181 m/s
B) 226 m/s
C) 155 m/s
D) 132 m/s
3) An electron (mass = 9.1 x 10
31
kg)
is trapped somewhere in a molecule which is 7.69 nm long. Calculate
the minimum kinetic energy of the electron.
A) 280
m
eV
B) 160
m
eV
C) 200 meV
D) 16
m
eV
4) A doublyionized lithium atom 3Li
++
undergoes a state transition from n = 5 to n = 4.
The wavelength of
the photon which is emitted is closest to:
A) 650 nm
B) 750 nm
C) 550 nm
D) 450 nm
E) 350 nm
5) A 35.0 pm photon undergoes multiple Compton scattering by stationary electrons until the final
wavelength of the photon is 75.0 pm.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 12/13/2011 for the course PHYS 2C PHYS 2C taught by Professor Groisman during the Spring '11 term at UCSD.
 Spring '11
 groisman

Click to edit the document details