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Author Question: When a photon collides with a free electron at rest and the direction of motion of the photon changes, (Read 88 times)

khang

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on: Aug 10, 2020

Question 1

What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work function is 5.0 eV when illuminated by a light whose wavelength is 200 nm?

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460

◦
650

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420

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550

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1 480


Question 2

When a photon collides with a free electron at rest and the direction of motion of the photon changes,

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the magnitude of the momentum of the photon does not change.

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the momentum of the electron does not change.

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the kinetic energy of the electron does not change.

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the total energy of the photon does not change.

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both the magnitude of the momentum and the total energy of the photon decrease.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by khang on Aug 10, 2020

xiazhe

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Reply #1 on: Aug 10, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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khang

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Reply 2 on: Aug 10, 2020
YES! Correct, THANKS for helping me on my review

cdmart10

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Reply 3 on: Yesterday
Excellent

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