Monochromatic light shines on a surface with work function 1.80 eV. The maximum energy of the emitted photoelectrons is 0.620 eV. What is the wavelength of the monochromatic light?

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abenebelie27Lv6

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The work function for platinum is 6.35eV.
(a.) Convert value of the work function from electron volts tojoules.
(b.) Find the cutoff frequency for platinum.
(c.) What maximum wavelength of light incident on platinum releasesphotoelectrons from the platinum's surface?
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1. A monochromatic light beam is incient on a barium target, whichhas a work function of 2.50eV. If a stopping potential of 1.5V isrequired what is the light beam photon energy (in eV)?

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Monochromatic light shines on a surface with work function 1.80 eV. The maximum energy of the emitted photoelectrons is 0.620 eV. What is the wavelength of the monochromatic light?

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