An electron is emitted from a metal surface, when (a) \( h v\phi_{0} \) (b) \( h v\phi_{0} \) (c...

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An electron is emitted from a metal surface, when
(a) \( h v\phi_{0} \)
(b) \( h v\phi_{0} \)
(c) \( h v=\phi_{0} \)
(d) \( 0h v\phi_{0} \)
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