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Thge work function of a metallic substan...

Thge work function of a metallic substance is 5 eV.Teh htreshold frequency is approximately

A

`1.6 xx 10^7 Hz`

B

`8.68 xx 10^(15) H z`

C

`9.68 xx 10^(17) Hz`

D

`1.2 xx 10^(15) Hz`.

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