The maximum energy of photoelectrons from aluminum is 2.3 ev for radiation of wavelength 200nm and 0.90ev for radiation of 216nm. Then the planck's const ant and the work function of aluminum is h=2.016x10 33j.s and W= 16.6 ev IO h=6.63x10-34.s and w= 16.6ev II O and W 15 ev III h=20.16x10-36.s n ba a

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