PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
6th Edition
ISBN: 9781429206099
Author: Tipler
Publisher: MAC HIGHER
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The “work function” of the metal lithium is4.6x10-19 J. If irradiated with light of frequency9.5x1014 Hz, what is:
a) the max.KE of the photoelectrons ejected?
b) their velocity?
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?
The “work function” of the metal lithium is4.6x10-19 J. If irradiated with light of frequency9.5x1014 Hz, what is:
a) the max.KE of the photoelectrons ejected?
Chapter 34 Solutions
PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
Ch. 34 - Prob. 1PCh. 34 - Prob. 2PCh. 34 - Prob. 3PCh. 34 - Prob. 4PCh. 34 - Prob. 5PCh. 34 - Prob. 6PCh. 34 - Prob. 7PCh. 34 - Prob. 8PCh. 34 - Prob. 9PCh. 34 - Prob. 10P
Ch. 34 - Prob. 11PCh. 34 - Prob. 12PCh. 34 - Prob. 13PCh. 34 - Prob. 14PCh. 34 - Prob. 15PCh. 34 - Prob. 16PCh. 34 - Prob. 17PCh. 34 - Prob. 18PCh. 34 - Prob. 19PCh. 34 - Prob. 20PCh. 34 - Prob. 21PCh. 34 - Prob. 22PCh. 34 - Prob. 23PCh. 34 - Prob. 24PCh. 34 - Prob. 25PCh. 34 - Prob. 26PCh. 34 - Prob. 27PCh. 34 - Prob. 28PCh. 34 - Prob. 29PCh. 34 - Prob. 30PCh. 34 - Prob. 31PCh. 34 - Prob. 32PCh. 34 - Prob. 33PCh. 34 - Prob. 34PCh. 34 - Prob. 35PCh. 34 - Prob. 36PCh. 34 - Prob. 37PCh. 34 - Prob. 38PCh. 34 - Prob. 39PCh. 34 - Prob. 40PCh. 34 - Prob. 41PCh. 34 - Prob. 42PCh. 34 - Prob. 43PCh. 34 - Prob. 44PCh. 34 - Prob. 45PCh. 34 - Prob. 46PCh. 34 - Prob. 47PCh. 34 - Prob. 48PCh. 34 - Prob. 49PCh. 34 - Prob. 50PCh. 34 - Prob. 51PCh. 34 - Prob. 52PCh. 34 - Prob. 53PCh. 34 - Prob. 54PCh. 34 - Prob. 55PCh. 34 - Prob. 56PCh. 34 - Prob. 57PCh. 34 - Prob. 58PCh. 34 - Prob. 59PCh. 34 - Prob. 60PCh. 34 - Prob. 61PCh. 34 - Prob. 62PCh. 34 - Prob. 63PCh. 34 - Prob. 64PCh. 34 - Prob. 65PCh. 34 - Prob. 66PCh. 34 - Prob. 67PCh. 34 - Prob. 68PCh. 34 - Prob. 69PCh. 34 - Prob. 70PCh. 34 - Prob. 71PCh. 34 - Prob. 72PCh. 34 - Prob. 73P
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- The work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as photoelectrode? What is the stopping potential when for the emitted electrons when this photo electrode is exposed to radiation of frequency 1200 THz?arrow_forwardWhat is the de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?arrow_forwardShow that the energy E in eV of a photon is given by E=1.241106 m/A. where A is its wavelength in meters.arrow_forward
- At what velocity will an electron have a wavelength of 1.00 m?arrow_forwardFind the maximum velocity of photoelectrons ejected by an 80-nm radiation, if the work function of photoelectrode is 4.73 eV.arrow_forwardIn a photoelectric experiment, a metal with aφ=1.5 eV is used as a target. When a lamp operatingat 500 nm illuminates the target, photoelectrons are observed to be emitted from the target. What isthe maximum kinetic energy of those electrons?arrow_forward
- If light of wavelength, å = 4000 A and intensity 100 W/m* incident on a metal plate of threshold frequency 5.5 x10* Hz , what will be the maximum kinetic energy, and work function of photoelectron? (Take, h=6.6x10* J.s ).arrow_forward(b) A/ The work function of a certain metal is o = 4.15 eV. Determine the minimum frequency of light for which photoelectrons are emitted from the metal. (Planck's constant is: h = 4.1357x10^-15 eV s.) (c) B/ Determine the corresponding wavelength of light. (Possibly useful constant: hc = 1240 eVnm.) Correction: the work function is = 5.30 eV; (a) C/ Calculate the kinetic energy of the emitted electrons if the frequency of the photons is doubled.arrow_forwardWhen ultraviolet light with a wavelength of 254 nm falls on a clean copper surface, the stopping potential necessary to stop emission of photoelectrons is 0.181 V. (a) What is the photoelectric threshold wavelength for this copper surface? (b) What is the work function for this surface, and how does your calculated value compare with that given in Tablearrow_forward
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