14. The work function for platinum is 6.35 eV. Ultraviolet GP light of wavelength 150 nm is incident on the clean sur- Q C face of a platinum sample. We wish to predict the stop- ping voltage we will need for electrons ejected from the surface. (a) What is the photon energy of the ultravio- let light? (b) How do you know that these photons will eject electrons from platinum? (c) What is the imum kinetic energy of the ejected photoelectrons? (d) What stopping voltage would be required to arrest the current of photoelectrons ? max-

14. The work function for platinum is 6.35 eV. Ultraviolet GP light of wavelength 150 nm is incident on the clean sur- Q C face of a platinum sample. We wish to predict the stop- ping voltage we will need for electrons ejected from the surface. (a) What is the photon energy of the ultravio- let light? (b) How do you know that these photons will eject electrons from platinum? (c) What is the imum kinetic energy of the ejected photoelectrons? (d) What stopping voltage would be required to arrest the current of photoelectrons ? max-

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter10: Atomic Physics

Section: Chapter Questions

Problem 6C

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Question

need help with b-d

14. The work function for platinum is 6.35 eV. Ultraviolet
GP light of wavelength 150 nm is incident on the clean sur-
Q C face of a platinum sample. We wish to predict the stop-
ping voltage we will need for electrons ejected from the
surface. (a) What is the photon energy of the ultravio-
let light? (b) How do you know that these photons will
eject electrons from platinum? (c) What is the
imum kinetic energy of the ejected photoelectrons?
(d) What stopping voltage would be required to arrest the
current of photoelectrons ?
max-

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