Question: The photoelectric work function of potassium is 2.3eV if light having a wavelength of 250 run falls on potassium, find (a) The stopping potential in

The photoelectric work function of potassium is 2.3eV if light having a wavelength of 250 run falls on potassium, find
(a) The stopping potential in volts;
(b) The kinetic energy in electron volts of the most energetic electrons ejected;
(c) The speed of these electrons.

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