The photon emitted during the de-excitation from the 1st excited level to the ground state of hydrogen atom is used to irradiate a photo cathode of a photocell, in which stopping potential of 5 V is used. Calculate the work function of the cathode used.

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The photon emitted during the de-excitation from the 1st excited level to the ground state of hydrogen
atom is used to irradiate a photo cathode of a photocell, in which stopping potential of 5 V is used.
Calculate the work function of the cathode used.
Transcribed Image Text:The photon emitted during the de-excitation from the 1st excited level to the ground state of hydrogen atom is used to irradiate a photo cathode of a photocell, in which stopping potential of 5 V is used. Calculate the work function of the cathode used.
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