Physics

Problem

4. In the photoelectric effect experiment, a stopping potential of

V_{\text {stop }}

is needed when light of frequency

\mathrm{f}_{\mathrm{o}}

shines on the electron-emitting metal surface. If the metal surface on which the light shines is replaced with a new material that has half the work function, what is the new stopping potential,

V_{\text {new }}

, for light of frequency shining on it? A)

V_{\text {new }}>2 V_{\text {stop }}

V_{\text {new }}=2 V_{\text {stop }}

V_{\text {stop }}<V_{\text {new }}<2 V_{\text {stop }}

D) It is indeterminate from the given information

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