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SOLVED:A photon of wavelength 3310 Åfalls on a photocathode and ejects an electron of chatsthe wavelength of the incident photon is changed to 5000  A, the energy of the ejected electron is 0972 ×10^-19  J. Calculate the value of the Planck's constant, the threshold frequency and the workfunction for the photocathode. Ans. 6.62 ×10^-34, 4.53 ×10^14 / s, 1.875
SOLVED:A photon of wavelength 3310 Åfalls on a photocathode and ejects …
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In a photoelectric experiment in which monochromatic light and a sodium photocathode are used, we find a stopping potential of 1.85  V for λ=3000 Åand of 0.82  V for λ= 4000 Å. From these data determine (a) a value for Planck's constant, (b) the work function of sodium in electron volts, and (c) the threshold wavelength for sodium. | Numerade
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