Electrons in a photoelectric-effect experiment emerge from an aluminum surface with a maximum KE 1.30 eV. What is the wavelength of the incident light in nm? [hc = 1240 nm.eV] [Work function of Al = 4.28 eV]

Electrons in a photoelectric-effect experiment emerge from an aluminum surface with a maximum KE 1.30 eV. What is the wavelength of the incident light in nm? [hc = 1240 nm.eV] [Work function of Al = 4.28 eV]

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter3: The Quantum Theroy Of Light

Section: Chapter Questions

Problem 42P

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Concept explainers

Compton effect

The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.

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The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.

Question

Electrons in a photoelectric-effect experiment emerge from an
aluminum surface with a maximum KE 1.30 eV. What is the
wavelength of the incident light in nm?
[hc = 1240 nm.eV]
[Work function of Al = 4.28 eV]
Photo-electrons are observed when a metal is illuminated with light
of wavelength less than 388 nm. What is the metal's work-function?

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