3.2. A photon of wavelength 350 nm and intensity 1.00 W/m² is directed at a potassium surface,with work function 2.2 eV.(a) Calculate the maximum kinetic energy of the emitted photoelectrons.(b) If 5% of the incident photons produce photoelectrons, how many are emitted per sec ifthe potassium surface has an area of 1 cm²?(c) Calculate the photoelectric current generated.

Part (a): Maximum Kinetic Energy of the Emitted PhotoelectronsStep 1: Calculate the frequency of the…

Answered: 3.2. A photon of wavelength 350 nm and…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A sodium surface is illuminated with 384-nm light. (a) Determine the energy of each photon in joules. (Enter your answer to at least four significant figures.) (b) Determine the energy of each photon in electron volts. (Enter your answer to at least three decimal places.) ev (c) Determine the maximum kinetic energy in electron volts of the ejected photoelectrons. ev
When ultraviolet light with a wavelength of 400.0 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV. (a) What is the work function of the metal surface? (b) What is the maximum kinetic energy of the photoelectrons when light of wavelength 300.0 nm falls on the same surface?
A 480 nm laser beam is incident on two different metallic surfaces, one made of sodium (Na), the other of magnesium (Mg). If the respective work functions of these metals are 2.66 eV and 3.66 eV, will electrons be ejected by the 480 nm photons? If so, calculate the maximum KE the photoelectrons can have.
The mathematical equation for studying the photoelectric effect is hν = W + 1/2 meu2 where ν is the frequency of light shining on the metal; W is the energy needed to remove an electron from the metal; and me and u are the mass and speed of the ejected electron, respectively. In an experiment, a student found that a maximum wavelength of 351 nm is needed to just dislodge electrons from a metal surface. Calculate the velocity (in m/s) of an ejected electron when the student employed light with a wavelength of 283 nm.
The work function for titanium is 4.33 eV. (a) Convert the value of the work function from electron volts to joules. J(b) Find the cutoff frequency for titanium. Hz(c) What maximum wavelength of light incident on titanium releases photoelectrons from the titanium's surface? nm(d) If light of energy 8.32 eV is incident on titanium, what is the maximum kinetic energy of the ejected photoelectrons? Give the answer in electron volts. eV(e) For photons of energy 8.32 eV, what stopping potential would be required to arrest the current of photoelectrons? V
Suppose a company wanted to develop an electricity-generating device based on the Earth as a blackbody. This temperature of 35°C at night. What would be the work function of a metal that could produce photoelectrons from the peak wavelength of the Earth's blackbody radiation at this temperature? What would be the kinetic company chose to base its operations in Death Valley, California, whose summers see a surface energy of a photoelectron produced by light half this wavelength?
When ultraviolet light with a wavelength of 420 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.1 eV. (a) What is the stopping potential for these photoelectrons with this Kmax? (b) What is the threshold frequency for this metal? (c) What is the maximum kinetic energy of photoelectrons when light of wavelength 314 nm falls on the same surface?

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