Ex1 / The minimum wave length for photoelectric emission in tungsten is230nm. What wave length must be used in order to emit an electron with amaximum energy of 1.5 eV?Ex4/ the wave length of light falling on a potassium surface is 770nm and thework function of a potassium is equal to 2.3eV. show the photoelectric effecthappening is possible or impossible?Ex5/The wavelength of the photoelectric threshold for silver is 3.250 x10- m.Determine the velocity of electron ejected from a silver surface by ultravioletof wavelognnessletarandi

1 nm = 10-9 m 1eV = 1.6× 10-19 J

Answered: Ex1 / The minimum wave length for…

Ex1 / The minimum wave length for photoelectric emission in tungsten is 230nm. What wave length must be used in order to emit an electron with a maximum energy of 1.5 eV?

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 71P: A 600-nm light falls on a photoelectric surface and electrons with the maximum kinetic energy of...

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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.

Recoil Velocity

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

Ex1 / The minimum wave length for photoelectric emission in tungsten is
230nm. What wave length must be used in order to emit an electron with a
maximum energy of 1.5 eV?
Ex4/ the wave length of light falling on a potassium surface is 770nm and the
work function of a potassium is equal to 2.3eV. show the photoelectric effect
happening is possible or impossible?
Ex5/The wavelength of the photoelectric threshold for silver is 3.250 x10- m.
Determine the velocity of electron ejected from a silver surface by ultraviolet
of wavelognnessletarandi

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