What minimum frequency of light is required to eject electrons from a surface with a work function of 5.5x10-19J? Show your work. Question 2 (6 points) 2. The maximum kinetic energy of electrons emitted from a tungsten surface is 1.3 eV. The surface has a work function of 3.97 eV and is illuminated by light. Calculate the wavelength of the light. Question 3 (4 points) 3. Light with a frequency of 2. 4 x 1015 Hz is directed at a metallic surface with a work function of 3.63 eV. a) Determine the maximum kinetic energy of the photo-electrons in joules. (rounded to 2 significant digits) Question 4 (3 points) b) Determine the cut-off potential necessary to stop the photo-electrons.

What minimum frequency of light is required to eject electrons from a surface with a work function of 5.5x10-19J? Show your work. Question 2 (6 points) 2. The maximum kinetic energy of electrons emitted from a tungsten surface is 1.3 eV. The surface has a work function of 3.97 eV and is illuminated by light. Calculate the wavelength of the light. Question 3 (4 points) 3. Light with a frequency of 2. 4 x 1015 Hz is directed at a metallic surface with a work function of 3.63 eV. a) Determine the maximum kinetic energy of the photo-electrons in joules. (rounded to 2 significant digits) Question 4 (3 points) b) Determine the cut-off potential necessary to stop the photo-electrons.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter29: Atomic Physics

Section: Chapter Questions

Problem 8P

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Welcome to this IE. You may navigate to any page you've seen already using the IE Outline tab on the right. A light source of wavelength, 1, illuminates a metal and ejects photoelectrons with a maximum kinetic energy of 1 ev. A second light source of wavelength A/2 ejects photoelectrons with a maximum kinetic energy of 4 ev. What is the work function of the metal? Give your answer in ev. f = ev
n = 5 n = 4 3. Refer to the illustration on the right. In a set of experiments on a hypothetical one-electron atom, you measure the wavelengths of the photons emitted from transitions ending in the ground state (n=1). You also observe that it takes 15 eV to ionize this atom. (a) What is the energy of the atom in each of the levels (i.e. n=1, n=2, n=3, n=4, n=5)? (b) If an electron made a transition from the n=4 to the n=2 level, what wavelength of light n = 3 n = 2 would it emit? n = 1 A = 73.86 nm A = 75.63 nm A=79.76 nm A = 94.54 nm
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Could you please solve part 3 of this question: Now consider the electron in a material with a gap of 5 eV. Because of the gap, in order to increase the electron's momentum, the electric field must increase the electron's energy by 5 eV, which is impossible without applying ultraviolet light. In this case, what is the electron's velocity after 10-5 s in the electric field? https://www.bartleby.com/questions-and-answers/consider-an-electron-with-initial-velocity-1-ms-in-the-x-direction.-we-turn-on-an-electric-field-of-/e8d9dafc-d854-4bd1-9133-eda651d0c30a
If a hydrogen atom in the ground state absorbs a 93.7 nm photon, corresponding to a transition line in the Lyman series, how does this affect the atom's energy and size? How much energy is needed to ionize the atom when it is in this excited state? Give your answers in absolute units, and relative to the ground state. (the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n = 1 (where n is the principal quantum number), the lowest energy level of the electron.)
An electron in a hydrogen atom makes a transition from the state n = 3 to the state n= 2. Give the wavelength of the photon emitted during this transition in units of nm. Round your answer to 2 significant figures. Add your answer
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