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Principles of Physics: A Calculus-Based Text, Hybrid (with Enhanced WebAssign Printed Access Card)
5th Edition
ISBN: 9781305586871
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 29, Problem 26P
To determine
Why the given reaction is not possible.
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You illuminate a metal with light of wavelength 640 nm and find that the photoelectrons have a maximum kinetic energy of 0.70 eV. You then illuminate the same metal with light of another wavelength and find a maximum kinetic energy of 2.5 eV for the photoelectrons.
What is the second wavelength, in nanometers?
A potassium surface is illuminated by a monochromatic laser light with a wavelength of 400 nm. Determine the maximum speed of a photoelectron emitted from this surface if the potassium surface has a work function of 2.30 eV. ??=9.11×10−31??
thanks.
The work function of sodium is 2.3 eV. What is the longest wavelength that can cause photoelectric emission? What should be the stopping potential if the sodium atom is illuminated by light of λ = 400 nm?
Chapter 29 Solutions
Principles of Physics: A Calculus-Based Text, Hybrid (with Enhanced WebAssign Printed Access Card)
Ch. 29.2 - Prob. 29.1QQCh. 29.2 - Prob. 29.2QQCh. 29.4 - Prob. 29.3QQCh. 29.5 - Prob. 29.4QQCh. 29.6 - Prob. 29.5QQCh. 29.6 - Prob. 29.6QQCh. 29 - Prob. 1OQCh. 29 - Prob. 2OQCh. 29 - Prob. 3OQCh. 29 - Prob. 4OQ
Ch. 29 - Prob. 5OQCh. 29 - Prob. 6OQCh. 29 - Prob. 7OQCh. 29 - Prob. 8OQCh. 29 - Prob. 9OQCh. 29 - Prob. 10OQCh. 29 - Prob. 1CQCh. 29 - Prob. 2CQCh. 29 - Prob. 3CQCh. 29 - Prob. 4CQCh. 29 - Prob. 5CQCh. 29 - Prob. 6CQCh. 29 - Prob. 7CQCh. 29 - Prob. 8CQCh. 29 - Prob. 9CQCh. 29 - Prob. 10CQCh. 29 - Prob. 1PCh. 29 - Prob. 2PCh. 29 - Prob. 3PCh. 29 - Prob. 4PCh. 29 - Prob. 5PCh. 29 - Prob. 6PCh. 29 - Prob. 7PCh. 29 - Prob. 8PCh. 29 - Prob. 10PCh. 29 - Prob. 11PCh. 29 - Prob. 12PCh. 29 - Prob. 13PCh. 29 - Prob. 14PCh. 29 - Prob. 15PCh. 29 - Prob. 16PCh. 29 - Prob. 17PCh. 29 - Prob. 18PCh. 29 - Prob. 19PCh. 29 - Prob. 20PCh. 29 - Prob. 21PCh. 29 - Prob. 22PCh. 29 - Prob. 23PCh. 29 - Prob. 24PCh. 29 - Prob. 25PCh. 29 - Prob. 26PCh. 29 - Prob. 27PCh. 29 - Prob. 28PCh. 29 - Prob. 29PCh. 29 - Prob. 30PCh. 29 - Prob. 31PCh. 29 - Prob. 32PCh. 29 - Prob. 33PCh. 29 - Prob. 34PCh. 29 - Prob. 35PCh. 29 - Prob. 36PCh. 29 - Prob. 37PCh. 29 - Prob. 38PCh. 29 - Prob. 39PCh. 29 - Prob. 40PCh. 29 - Prob. 41PCh. 29 - Prob. 42PCh. 29 - Prob. 43PCh. 29 - Prob. 44PCh. 29 - Prob. 45PCh. 29 - Prob. 46PCh. 29 - Prob. 47PCh. 29 - Prob. 48PCh. 29 - Prob. 49PCh. 29 - Prob. 50PCh. 29 - Prob. 51PCh. 29 - Prob. 52PCh. 29 - Prob. 53PCh. 29 - Prob. 54PCh. 29 - Prob. 55PCh. 29 - Prob. 57PCh. 29 - Prob. 58PCh. 29 - Prob. 59PCh. 29 - Prob. 60PCh. 29 - Prob. 61PCh. 29 - Prob. 63PCh. 29 - Prob. 64PCh. 29 - Prob. 65PCh. 29 - Prob. 66P
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- If the work function of a metal is 3.2 eV, what is the maximum wavelength that a photon can have to eject a photoelectron from this metal surface?arrow_forwardA laser with a power output of 2.00 mW at a 400-nm wavelength is used to project a beam of light onto a calcium photoelectrode. (a) How many photoelectrons leave the calcium surface per second? (b) What power is carried away by ejected photoelectrons, given that the work function of calcium is 2.31 eV? (c) Calculate the photocurrent. (d) If the photoelectrode suddenly becomes electrically insulated and the setup of two electrodes in the circuit suddenly starts to act like a 2.00-pF capacitor, how long will current flow before the capacitor voltage stops it?arrow_forwardIn the interpretation of the photoelectric effect, how is it known that an electron does not absorb more than one photon?arrow_forward
- Estimate the binding energy of electrons in magnesium, given that the wavelength of 337 nm is the longest wavelength that a photon may have to eject a photoelectron from magnesium photoelectrode.arrow_forwardA 400-nm laser beam is projected onto a calcium electrode. The power of the laser beam is 2.00 mW and the work function of calcium is 2.31 eV. (a) How many photoelectrons per second are ejected? (b) What net power is carried away by photoelectrons?arrow_forwardA photoelectron is ejected from a metal via the photoclectric effect. A closer look reveals it is exhibiting wave-like behavior with a wavelength of 0.638 nm. Determine the kinetic energy of the photoelectron. If the photoelectron was ejected from a metal by ultraviolet light with a wavelength of 75 nm, what is the work function of the metal from which it was emitted?arrow_forward
- 8 5.00-eV photons are incident on a metal, generating photoelectrons that have a maximum kinetic energy of 0.69 eV. Based on the reference table provided at the top of this exam, what is this metal? sodium (Na) O copper (Cu) aluminium (Al) O zinc (Zn) O iron (Fe)arrow_forwardb) Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (2 = 546.1 nm) is used, a stopping potential of 0.376 V reduces the photocurrent to zero. Based on this measurement, %3D i. Calculate the work function for this metal. ii. If the yellow light from a helium discharge tube (2 = 587.5 nm) is used, find the %3D new stopping potential.arrow_forwardA strange metallic rock is found and is being tested. Suppose that light with a frequency of 9.40 ✕ 1014 Hz is incident upon the rock and a stopping potential of 1.50 V is needed to reduce the electron current to zero in a photoelectric experiment.What is the minimum frequency of light for which electrons are still ejected from the surface of this material? Hzarrow_forward
- What is the greatest wavelength of light that will cause the emission of photoelectrons from sodium. If 200nm light falls on the sodium surface, what will be the greatest kinetic energy of photoelectrons (2.3 ev for sodium).arrow_forwardThe energy conservation principle that applies to the photoelectric experiment is Ephoton = (KE)electron + W, where W is the “work function” for the metal. (The work function is the minimum energy required to eject an electron from the metal surface.) The work function for calcium metal is 4.60 10−19 J. If calcium is irradiated with 400-nm photons, what is the de Broglie wavelength of the resulting photoelectron beam?arrow_forwardWhen photons with an energy of 3.0 electron-volts strike a photoelectric surface the maximum kinetic energy of the emitted photoelectrons is 2.0 electron- volts. What is the work function of the ?surface 1.0 ev O 0.67 eV 1.5 ev O 5.0 ev Oarrow_forward
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