In an advanced laboratory class a student performs the photoelectric experiment. Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. It is found that 3.47 V is needed to stop all the electrons when the wavelength of the light is 270 nm, and 4.98 V for a wavelength of 213 nm. What is the work function of the metal? What is Planck's constant based on this measurement?

In an advanced laboratory class a student performs the photoelectric experiment. Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. It is found that 3.47 V is needed to stop all the electrons when the wavelength of the light is 270 nm, and 4.98 V for a wavelength of 213 nm. What is the work function of the metal? What is Planck's constant based on this measurement?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter27: Quantum Theory

Section: Chapter Questions

Problem 55A

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