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The work function of a metal is 8.1711 x 10 -19 J. What is the minimum frequency of light needed to eject an electron from

The work function of a metal is 8.1711 x 10^-19 J. What is the minimum frequency of light needed to eject an electron from the metal's surface?

5.217x 10^6 s-1

1.2332x 10^15 s-1

4.1134x10^6 s-1

1.5355x 10^15 s-1

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