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  4. Silver has a work function of 4.7 eV. When UV light of wavelength 100 mm is incident upon it. A potential of 7.7 V is required to stop the photo electrons from reaching the collector plate. How much potential is required to stop photo electrons when light of wavelength 200 mm is incident upon silver?

Q. Silver has a work function of . When UV light of wavelength is incident upon it. A potential of is required to stop the photo electrons from reaching the collector plate. How much potential is required to stop photo electrons when light of wavelength is incident upon silver?

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Solution:

(Einstein's equations)
......(1)
.....(2)
from and



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