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Question 22M.1.HL.TZ2.39

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.HL.TZ2.39
Level HL Paper 1 Time zone TZ2
Command term Question number 39 Adapted from N/A
39.
[Maximum mark: 1]
22M.1.HL.TZ2.39

The dashed line represents the variation with incident electromagnetic frequency f of the kinetic energy EK of the photoelectrons ejected from a metal surface. The metal surface is then replaced with one that requires less energy to remove an electron from the surface.

Which graph of the variation of EK with f will be observed?

[1]

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A

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