Photons of energy 6ev incident on a potassium surface of work function 2.1 ev .what is the stopping potential?
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Answer:
The stopping potential is 3.9 V
Explanation:
Photons of energy 6ev incident on a potassium surface of work function 2.1ev
To get the value of the stopping potential we need to subtract work function of the metal from the energy of the incident photons.
Therefore,
eVs= 6ev+2.1ev
=> eVs= 3.9 ev
=> Vs= 3.9v
Hence the stopping potential is 3.9v
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