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Molybdenum has a work function of 4.2 eV. (a) Find the cutoff wavelength and threshold frequency for the photoelectric effect. (b) Calculate the stopping potential if the incident light has a wavelength of 200 nm.

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Tauseef Shaikh
Tauseef ShaikhLv10
30 Oct 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Figure P39.41 shows the stopping potential versus the incident photon frequency for the photoelectric effect for sodium. Use the graph to find (a) the work function of sodium, (b) the ratio h/e, and (c) the cutoff wavelength. The data are taken from R. A. Millikan, Physical Review7:362 (1916).

The work function for platinum is 6.35 eV.

(a) Convert the value of the work function from electron volts to joules.
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(b) Find the cutoff frequency for platinum.
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(c) What maximum wavelength of light incident on platinum releases photoelectrons from the platinum's surface?
 nm

(d) If light of energy 8.02 eV is incident on platinum, what is the maximum kinetic energy of the ejected photoelectrons? Give the answer in electron volts.
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(e) For photons of energy 8.02 eV, what stopping potential would be required to arrest the current of photoelectrons?
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In a photoelectric-effect experiment it is observed that no currentflows unless the wavelength is less than 425 nm.
(a) What is the work function of this material?
eV
(b) What is the stopping voltage required if light of wavelength384 nm is used?

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