(6%) Problem 5: In a photoelectric effect experiment you illuminate a metal with light of an unknown wavelength and measure the maximum kinetic energy of the photoelectrons to be 0.65 eV. Then you illuminate the same metal with light of a wavelength known to be 2/3 of the first wavelength and measure a maximum kinetic energy of 2.2 eV for the photoelectrons. 50% Part (a) Find the first wavelength, in nanometers Grade Sama Deductions Potential Sabmbsions 7 9 tan) cos0 sin) Attempts rem (55% per atter detailed vie 4 E 5 6 acos0 asin) cotan) 3 1 sinh) acotan) atan0 0 cotanh) tanh0 cosh) NO DegreesRadians I give up! Hint Submit Feedback: 0 deductioe per feedback deduction per hint Hints remaining Hints: 0 & 50% Part (b) Find the metal's work function, in electron volts.
(6%) Problem 5: In a photoelectric effect experiment you illuminate a metal with light of an unknown wavelength and measure the maximum kinetic energy of the photoelectrons to be 0.65 eV. Then you illuminate the same metal with light of a wavelength known to be 2/3 of the first wavelength and measure a maximum kinetic energy of 2.2 eV for the photoelectrons. 50% Part (a) Find the first wavelength, in nanometers Grade Sama Deductions Potential Sabmbsions 7 9 tan) cos0 sin) Attempts rem (55% per atter detailed vie 4 E 5 6 acos0 asin) cotan) 3 1 sinh) acotan) atan0 0 cotanh) tanh0 cosh) NO DegreesRadians I give up! Hint Submit Feedback: 0 deductioe per feedback deduction per hint Hints remaining Hints: 0 & 50% Part (b) Find the metal's work function, in electron volts.
Modern Physics
3rd Edition
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Chapter3: The Quantum Theroy Of Light
Section: Chapter Questions
Problem 20P
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Transcribed Image Text:(6%) Problem 5: In a photoelectric effect experiment you illuminate a metal with light of an unknown wavelength and measure the
maximum kinetic energy of the photoelectrons to be 0.65 eV. Then you illuminate the same metal with light of a wavelength known to
be 2/3 of the first wavelength and measure a maximum kinetic energy of 2.2 eV for the photoelectrons.
50% Part (a) Find the first wavelength, in nanometers
Grade Sama
Deductions
Potential
Sabmbsions
7
9
tan)
cos0
sin)
Attempts rem
(55% per atter
detailed vie
4
E
5
6
acos0
asin)
cotan)
3
1
sinh)
acotan)
atan0
0
cotanh)
tanh0
cosh)
NO
DegreesRadians
I give up!
Hint
Submit
Feedback: 0 deductioe per feedback
deduction per hint Hints remaining
Hints: 0
& 50% Part (b) Find the metal's work function, in electron volts.
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