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An isolated metal body is illuminated wi...

An isolated metal body is illuminated with monochromatic light and is observed to become charged to a steady positive potential 1.0 V with respect to the surrounding. The work function of the metal is 3.0 eV. The frequency of the incident light is `"_______________"`.

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The correct Answer is:
when the potential is steady, photo electric emission just stop when `hv = ( 3+1 ) eV = 4.0 eV`
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