Work function of a photoelectric material is \( 3.3 \mathrm{eV} \)....

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Work function of a photoelectric material is \( 3.3 \mathrm{eV} \).
\( \mathrm{P} \)
What will be its threshold frequency?
W
(1) \( 8 \times 10^{10} \mathrm{~Hz} \)
(3) \( 8 \times 10^{20} \mathrm{~Hz} \)
(2) \( 8 \times 10^{14} \mathrm{~Hz} \)
(4) \( 8 \times 10^{25} \mathrm{~Hz} \)
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