14A metallic surface is first irradiated with Ultraviolet light and then with Infraredlight. What will be the change in the K.E. of the emitted photoelectrons (Note:Ultraviolet has more frequency that infrared). *They will not make any differenceInfrared radiations have longer wavelength so K.E will increaseInfrared radiations have shorter wavelength so K.E will increaseU.V radiations have shorter wavelength so K.E will decrease

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A metallic surface is first irradiated with Ultraviolet light and then with Infrared light. What will be the change in the K.E. of the emitted photoelectrons (Note: Ultraviolet has more frequency that infrared). *

A metallic surface is first irradiated with Ultraviolet light and then with Infrared light. What will be the change in the K.E. of the emitted photoelectrons (Note: Ultraviolet has more frequency that infrared). *

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter39: Introduction To Quantum Physics

Section: Chapter Questions

Problem 47CP

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Question

14
A metallic surface is first irradiated with Ultraviolet light and then with Infrared
light. What will be the change in the K.E. of the emitted photoelectrons (Note:
Ultraviolet has more frequency that infrared). *
They will not make any difference
Infrared radiations have longer wavelength so K.E will increase
Infrared radiations have shorter wavelength so K.E will increase
U.V radiations have shorter wavelength so K.E will decrease

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